Behavior only happens when motivation, ability, and a prompt converge

Fogg's foundational framework, the Fogg Behavior Model, holds that any specific behavior occurs only when three elements align sufficiently: motivation (how much you want to do it right now), ability (how easy the behavior is to perform), and a prompt (something that cues you to do it). If any one is too low, the behavior simply won't happen, no matter how strong the other two are.

Fogg argues most behavior-change advice focuses almost exclusively on boosting motivation — inspirational messaging, willpower exercises, ambitious goal-setting — while motivation is actually the least reliable of the three, fluctuating throughout the day and declining under stress or fatigue. Ability and prompts, by contrast, can be engineered directly and durably: you can make a behavior easier, and attach it to a reliable existing cue.

This reframing explains why so many resolutions fail even when someone genuinely wants to change: high motivation on January 1st inevitably fades, but a behavior never designed to require high motivation doesn't depend on that fade for survival.

Takeaway: don't try to out-motivate your future self — design the habit so it barely needs motivation to survive.