3 Key Lessons from Atomic Habits This section of the Atomic Habits summary presents key points from three of the core themes of the book. Lesson 1: Small habits make a big difference It is so easy to overestimate the importance of one defining moment and underestimate the value of making small improvements on a daily basis. Meanwhile, improving by 1 percent isn’t particularly notable— sometimes it isn’t even noticeable—but it can be far more meaningful, especially in the long run. The difference a tiny improvement can make over time is astounding. Here’s how the math works out: if you can get 1 percent better each day for one year, you’ll end up thirty-seven times better by the time you’re done. Conversely, if you get 1 percent worse each day for one year, you’ll decline nearly down to zero. What starts as a small win or a minor setback accumulates into something much more. It doesn’t matter how successful or unsuccessful you are right now. What...