Why do so many of us fail to lose weight? Why can't we go to bed early and wake up early? Is it because of a lack of determination? Not at all. The thing is, we are doing it the wrong way. More specifically, it's because we haven't built an effective behavioral system. James Clear finds that it takes four steps to form a habit. Cue, craving, response, and reward are the pillars of every habit. This book summarizes the four laws that correspond to the four steps to help you quickly build good habits or, counterintuitively, break bad ones.