■ The inversion of the 3rd Law of Behavior Change is make it difficult. ■ A commitment device is a choice you make in the present that locks in better behavior in the future. ■ The ultimate way to lock in future behavior is to automate your habits. ■ Onetime choices—like buying a better mattress or enrolling in an automatic savings plan—are single actions that automate your future habits and deliver increasing returns over time. ■ Using technology to automate your habits is the most reliable and effective way to guarantee the right behavior.