Habits form when behaviors are repeated in stable contexts often enough that they become more automatic and require less conscious effort. Cues trigger routines, routines produce outcomes, and the brain gradually learns the pattern.

This is why environment matters so much. People often think discipline lives only in willpower, but habit design shows that repetition, cues, and friction often shape behavior more reliably than motivation alone.

Reference:

Wikipedia: Habit

https://en.wikipedia.org/wiki/Habit