
Forget big changes. "Think Small" reveals the behavioral science secrets Nobel laureate Richard Thaler endorses for achieving massive goals through tiny actions. Developed by Nudge Unit veterans, these surprisingly simple strategies transform overwhelming ambitions into achievable victories - one small step at a time.
Owain Service and Rory Gallagher, authors of Think Small: The Surprisingly Simple Way to Reach Big Goals, are pioneering behavioral science experts and founding members of the UK’s Behavioural Insights Team (BIT), often called the "Nudge Unit."
Service, former deputy director of the Prime Minister’s Strategy Unit, and Gallagher, managing director of BIT’s Asia-Pacific operations, combine decades of experience applying behavioral science to public policy and personal development.
Their work focuses on translating evidence-based strategies into actionable frameworks for goal achievement, a theme central to Think Small, which blends self-help practicality with career-success insights. Their methods, honed through collaborations with governments and organizations globally, emphasize incremental changes to drive transformative results. The book distills their research into a seven-step system for overcoming procrastination and sustaining motivation.
Service and Gallagher’s expertise has been featured in international conferences like Happiness & Its Causes and media platforms, reinforcing their authority in behavioral change. Think Small reflects their mission to democratize behavioral science, with principles adopted by institutions and individuals worldwide.
Think Small explores how behavioral science and incremental changes help achieve ambitious goals. The book presents a seven-step framework emphasizing small, actionable steps—like setting clear rules, making public commitments, and designing effective incentives—to drive meaningful progress. Drawing from the authors’ work in the UK’s Behavioural Insights Team, it blends research with real-world examples, showing how "thinking small" leads to outsized results.
This book is ideal for self-improvement seekers, business leaders, and policymakers interested in practical behavioral science. Its actionable advice applies to personal goals (e.g., fitness routines) and organizational challenges (e.g., policy implementation). Professionals in psychology, marketing, or public administration will find its data-driven strategies particularly valuable.
Yes—readers praise its research-backed, no-fluff approach to goal-setting. Unlike generic self-help books, it offers tested methods like "implementation intentions" (when, how, where planning) and habit-building techniques. With examples from IKEA to government policies, it balances theory with practicality, making it a standout for actionable insights.
The book uses principles like social norms and cognitive biases to drive behavior. For example, making commitments public taps into our desire to meet others’ expectations, while gamified incentives leverage our response to immediate rewards. These tactics, tested in policy and business contexts, help bridge the gap between intention and action.
This strategy transforms vague intentions into concrete plans. Instead of “I’ll exercise tomorrow,” specify: When (after breakfast), How (5K run), and Where (local park). This method reduces procrastination by creating a mental script, making follow-through easier—a technique validated by behavioral studies.
Both books apply behavioral science, but Think Small focuses on individual goal achievement, while Nudge emphasizes policy design. Service and Gallagher (who worked with Thaler) offer a more tactical, step-by-step guide, whereas Nudge explores broader choice architecture. They complement each other for personal and systemic change.
Yes. The authors cite companies like IKEA and Facebook, which achieved scale through incremental steps. Key takeaways include prioritizing short-term wins to build momentum, simplifying processes to reduce friction, and using incentives to align team behavior with organizational goals.
Some readers note its focus on simplicity might overlook systemic barriers to change (e.g., socioeconomic factors). However, most praise its practicality, with one reviewer calling it “the missing manual” for applying behavioral science.
It emphasizes “small wins” to build momentum, like starting with micro-habits (e.g., 5-minute daily tasks) and gradually increasing complexity. Public tracking and immediate rewards reinforce consistency, helping turn isolated actions into automatic routines.
In an era of distraction and complex challenges, its emphasis on incremental progress resonates. Remote work, AI-driven changes, and burnout culture make its strategies—like chunking tasks and designing motivating environments—increasingly vital for sustaining productivity.
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Small changes can have surprisingly big effects.
If you want to encourage a behavior, make it easy.
People are more likely to do something if they see others doing it.
We are more likely to follow through with a plan if we make a specific commitment to when and where it will happen.
The key to reaching big goals is to think small.
Break down key ideas from Think Small into bite-sized takeaways to understand how innovative teams create, collaborate, and grow.
Distill Think Small into rapid-fire memory cues that highlight key principles of candor, teamwork, and creative resilience.

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Have you ever set a big goal for yourself, only to feel overwhelmed and give up before you even start? You're not alone. As behavioral scientists, we've spent years studying how people can achieve their goals more effectively. What we've discovered might surprise you: the key to reaching big goals is to think small. In this book, we'll show you how small changes in your approach can lead to big results. We'll explore seven simple steps that can help you set, plan for, and achieve your goals, whether they're personal or professional. These steps are based on cutting-edge behavioral science and have been tested in real-world situations. So, let's begin our journey to think small and achieve big.