Singletasking: Get More Done One Thing at a Time
Shows why the brain cannot really multitask and what all that switching costs. It also offers simple ways to protect your focus, organize your day and give the people around you real attention.

Table of Content
1. Introduction
1 min 01 sec
If your day feels like a string of half-finished tasks and half-heard conversations, the usual fix of doing more at once is making it worse. In Singletasking, leadership consultant Devora Zack argues that multitasking, as most of us picture it, does not exist: the brain only jumps between tasks, and every jump costs focus and memory. Her alternative is plain and demanding. Focus on a single task, and nothing else, until you consciously choose to switch to the next one.
Zack builds her case from car crash figures, brain research, a goalkeeper’s record night and a famous violinist ignored in a subway station. The argument running through all of it is that undivided attention wins on every count that matters: safety, the quality of your work, your relationships, your understanding of yourself and your everyday happiness. Along the way she offers small tools, from grouping similar tasks to keeping an empty half hour in your calendar, that you can try at your desk tomorrow morning.
2. Stop paying the hidden price of multitasking
1 min 40 sec
Doing several things at once feels like the only way to survive a busy day. The numbers from roads and research labs tell a different story, and the costs go well beyond lost time.
3. Give one task everything and reach your best work
1 min 44 sec
A goalkeeper on a losing team set a record that night, and he explained it in a single sentence. Zack uses his match to show what the brain can do when nothing else competes for it.
4. Catch your wandering mind and fence out distractions
1 min 32 sec
Forgetting a new name seconds after hearing it seems like a memory problem. Zack sees something else behind it, and her fix involves both what happens inside your head and what reaches your desk.
5. Group similar work and leave room for surprises
1 min 42 sec
There is a reason a doctor can see an emergency today but not your sore throat. The same planning trick, plus a simple way of sorting your tasks, keeps a busy schedule from falling apart.
6. Give people full attention and be remembered
1 min 37 sec
Senior executives were asked what a glance at your phone during a meeting tells them about you. Their answer is uncomfortable, and a thirty-year-old memory of one brief conversation shows the alternative.
7. Step away to solve the problems you keep avoiding
1 min 29 sec
People give sharp advice to friends and then stumble over the same kind of problem in their own lives. Zack explains why, and why one unplugged hour a week may help more than another evening at the office.
8. Find more joy by living one moment at a time
1 min 40 sec
One of the world’s finest violinists played Bach for commuters and earned almost nothing. Only one group kept stopping to listen, and they hold a clue about what makes a day feel good.
9. Conclusion
1 min 09 sec
Zack’s book adds up to a simple trade. You give up the feeling of doing everything at once, and in return you get back what that feeling was quietly costing you: safer roads, a sharper memory, work that reaches flow, conversations people remember and a mind calm enough to see its own problems. Productivity, in her view, does not come from a packed schedule attacked all at once. It comes from choosing what matters and doing it with focus and calm, one piece after another.
Her own starting point is to cut the fat. Before you open anything at work tomorrow, look over your tasks and separate the essential few from the many small ones, then do the essential ones first. Group what remains by type, and build a buffer into your day for surprises, much as doctors usually set aside two free half hours for emergencies. When someone is talking to you, leave the phone in your pocket.
And remember the subway station. A world-class violinist played Bach for 45 minutes, and the only people who really heard him were the ones not looking at anything else.
About this book
What is this book about?
Answering texts over lunch, checking social media mid-report, taking calls in the car: multitasking feels like the only way through a crowded day. Devora Zack argues it is doing the opposite. Drawing on brain research, accident statistics and studies from Stanford, Harvard and the University of Southern California, she shows that the brain does not handle several things at once. It switches between them, and every switch costs focus, memory and calm. Her alternative is singletasking: choosing one task and giving it all of your attention until you move on. Zack shows how this opens the way to flow, the state of complete immersion that carried goalkeeper Tim Howard to a record 16 saves. She then turns it into everyday methods: steering a wandering mind back, blocking digital interruptions, grouping similar tasks, and keeping buffer time the way doctors do. The book reaches past productivity too. Zack explains why undivided attention makes people remember you, why an unplugged hour helps you see your own problems clearly, and why the most absorbed people tend to be the happiest.
Book Information
Who it's for
Busy office workers
Office workers who end busy days with little finished and a head full of open tabs.
Managers and team leads
Managers and team leads who take calls in meetings and want people to feel heard.
Hoping for calmer days
Anyone worn out by being always reachable who wants calmer, more absorbed days.
About the Author
Devora Zack
Devora Zack founded Only Connect Consulting, a firm that advises organizations on leadership. She holds an MBA from Cornell University and a BA from the University of Pennsylvania's Annenberg School for Communication. Singletasking, published in 2015, came after her first two books, Networking for People Who Hate Networking in 2010 and Managing for People Who Hate Managing in 2012.
Ratings & Reviews
Ratings at a glance
What people think
Listeners find this guide beneficial for boosting efficiency in any activity and value its inspiring message. The content is both thoroughly researched and educational, incorporating a sense of humor that makes for an engaging experience. They are impressed by the steady flow, with one listener highlighting how it mends personal connections, while another points to its functional networking strategies tailored for introverts.
Top reviews
Wow. Ever wonder why you feel like a fried circuit board by 3 PM? Devora Zack explains exactly why: your brain is literally shrinking from the stress of constant overstimulation. I found the sections on cortisol and the prefrontal cortex absolutely fascinating because they provided a biological reason for my lack of focus. This isn't just another dry business book; Zack’s humor makes the "scary" science much easier to swallow. The concept of "cluster tasking"—grouping similar chores together—has already saved me hours of mental energy this week. Honestly, the most impactful part for me was the realization that being "plugged in" is actually perceived as rude and unprofessional by high-level executives. It’s a wake-up call for anyone who thinks they’re being productive by answering emails during meetings. This is a must-read for anyone feeling scattered. It works.
Show moreFinally got around to reading this after struggling with burnout, and it feels like a weight has been lifted. Zack’s background in leadership consulting really shines through in her practical approach to time management. I’ve read her other books for introverts, and this has that same relatable vibe. The idea that our brains aren't evolved for multitasking was the permission I needed to stop trying to be a superhero. I especially liked the "time-shifting" strategy to balance high productivity with necessary decompression. It’s not just about doing more; it’s about doing things better and being happier. Personally, I found the pacing to be perfect for a busy professional. It’s motivational without being cheesy, and the advice is actually doable in a real-world office. It really restores your focus.
Show moreThe chapter on the "Parking Lot" technique alone is worth the price of admission. I constantly have random ideas popping into my head while I’m trying to focus, and having a dedicated place to "park" them has saved my workflow. Devora Zack writes with a blend of directness and wit that makes the pages fly by. I was shocked to learn that constant multitasking can actually shrink gray matter in the brain—talk about a motivation to change! The book is well-researched but stays light enough to be an enjoyable weekend read. I also appreciated the emphasis on building a "buffer" into your schedule for the unexpected. It’s a very grounded, realistic take on how to navigate a world that is constantly trying to steal your attention. Five stars. Truly helpful.
Show moreZack brings a much-needed dose of reality to our notification-obsessed culture with a writing style that is both punchy and accessible. The book focuses on the "how" of regaining focus rather than just the "why," which I appreciated. I particularly liked the "parking lot" technique for managing those intrusive thoughts that pop up when you're trying to work deep. My only real gripe is that some of the workplace examples felt a little unnatural and didn't quite map onto my own experience in a fast-paced environment. However, the core message about active listening and respect in relationships really resonated with me. We often forget that singletasking isn't just about work; it's about being present for the people we care about. It’s a solid professional tune-up that I’ll probably revisit every year to keep my habits in check. Good stuff.
Show moreAs someone who struggles to sit still, the concept of "cluster tasking" was a total game-changer for me. I’ve spent years trying to do five things at once, only to end up with five half-finished projects and a massive headache. Zack’s directness helped me see that I wasn't being efficient; I was just being frantic. I loved the advice on setting boundaries, like telling colleagues you’re "off-line" for a few hours to actually get work done. To be fair, some of the research cited felt a bit loosely connected to the office environment, but the practical hacks more than made up for it. The book is short and moves quickly, which I appreciated given the subject matter. It’s a great tool for anyone who needs to "reboot" their work habits and find some tranquility in a chaotic schedule. Worth the time.
Show moreSingletasking is a refreshingly direct antidote to the toxic productivity culture that demands we do everything at once. Zack’s basic premise is that we aren't actually multitasking; we are just rapidly switching tasks and losing efficiency every time. This resonated with me because I’ve noticed how much longer things take when I’m constantly checking Slack. The book is full of actionable advice, though some of the quizzes felt a bit like filler. I really appreciated the focus on active listening and how being "plugged in" can damage our professional reputation. Gotta say, it’s a great reminder that our full attention is the most valuable thing we can give to our work and our peers. While some examples are a bit over-the-top, the core message is vital for anyone working in a high-pressure environment today.
Show moreAfter hearing so much hype about Devora Zack’s work, I went in with high expectations, but I ended up feeling a bit middle-of-the-road about it. The central idea—that multitasking is a lie—is 100% accurate and timely. However, the book feels like it’s stretching a very simple concept across way too many pages. I found myself skimming through the repetitive chapters halfway through. Truth is, if you’ve practiced basic mindfulness or used a Pomodoro timer, you already know most of what is being taught here. The quizzes and exercises are a nice touch for those who like interactive books, but they felt a bit "self-help 101" to me. It’s a decent introductory text for someone who is completely new to productivity, but seasoned pros might find it a bit basic. It’s not a bad book, just not a groundbreaking one.
Show moreLook, I appreciate the humor and the quick pacing of this guide, but I couldn't shake the feeling that this could have been an essay. The author makes some great points about how divided attention hinders our memory and increases stress hormones like cortisol. That part was eye-opening! But after the first few chapters, the book starts to repeat the same "focus on one thing" mantra without adding much new depth. I did enjoy the section on how singletasking improves social skills and active listening, as it added a human element to the productivity talk. Still, the workplace anti-patterns she describes felt a bit dated and didn't always ring true for modern remote work. It’s a helpful reminder to slow down, but don’t expect a deep philosophical dive into the nature of attention. Just okay.
Show moreLet’s be real: this book could have been a five-page PDF or a decent blog post. While I agree with the core message that multitasking is a myth and that we are all just "task-switching" our way to burnout, the text repeats this point ad nauseam. Zack relies heavily on personal anecdotes that sometimes feel forced or a bit cringe-worthy in a professional setting. I was looking for deep, peer-reviewed science on how our selective attention functions, but instead, I got a lot of surface-level advice about putting my phone away. To be fair, the "parking lot" idea for stray thoughts is helpful, but you have to wade through a lot of filler to find those small gems. It’s a quick read. However, if you’ve already read a few books on time management, you won’t find anything revolutionary here. I’d recommend just looking up a summary online instead.
Show moreThe core thesis here is undeniably correct, but the execution left me wanting much more substance. I struggled with the tone; at times the humor felt misplaced, and the workplace scenarios were so grotesque they became distracting. For example, some of the arguments regarding texting while driving felt like a stretch when trying to prove why I shouldn't check email at my desk. There is a lot of "multitasking of thoughts" within the book itself, which is ironic for a text promoting focus. Frankly, it felt like a collection of blog posts that were expanded to meet a publisher's word count. I didn't feel like I gained a clear structure or a deep understanding of the cognitive science involved. If you want the gist, just read the introduction and skip the rest. It’s a shame because the topic is so important.
Show moreQuestions about this book
What is the main idea of Singletasking by Devora Zack?
Zack argues that real multitasking is impossible. Citing Stanford neuroscientist Eyal Ophir, she explains that the brain only switches attention between tasks, and every switch lowers performance and weakens memory. Her alternative is singletasking: giving one task your full attention before moving on. She says this improves the quality of your work, your relationships, your self-awareness and your happiness, and it opens the way to the flow state described by Mihály Csíkszentmihályi.
Is multitasking actually bad for your brain?
Zack argues that it is. Constant overstimulation and the stress that comes with it can shrink gray matter in the prefrontal cortex, the area used for complex thinking. Doing several things at once also triggers cortisol, a stress hormone that makes each task harder and wears down neurons. She adds that a 2011 Harvard study linked multitasking to limits on memory and other mental functions.
What is cluster tasking?
Cluster tasking means grouping tasks that need the same kind of effort and doing each group in its own time block. Zack’s example is a block of phone and Skype calls, then a block of writing such as emails and meeting summaries, then physical jobs like gardening. Because your brain stays in one mode per block, you avoid the cost of constant switching. She pairs it with keeping buffer time, as doctors do for emergencies.
How can I apply Singletasking at work?
Start each day by scanning your tasks and separating the essential few from the many trivial ones, then do the essential ones first. Put your phone in flight mode, close the door or block distracting sites during focused work. Group similar tasks into blocks and leave open time for surprises. In meetings and conversations, keep the phone away, since executives in a University of Southern California study read phone use as disrespect.
Who should read Singletasking?
It suits professionals who feel busy but unproductive, managers who want to be more present with their teams, and anyone stressed by being always reachable. Zack’s advice is practical and small in scale, from steering a wandering mind back to the task, to unplugging for one hour a week to reflect, to borrowing children’s habit of noticing what is in front of them.
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