Summary
Duhigg, then a New York Times reporter, spent years on the science and stories of habit formation: how a Procter & Gamble researcher saved Febreze, how Tony Dungy built a Super Bowl team, how Alcoa's CEO transformed safety culture. The mechanism is the habit loop: cue → routine → reward. You can't kill an old habit, but you can keep the cue and reward and substitute a new routine. Keystone habits trigger cascades of other change.



