As fleeting commitments, diets often fail. Thinking of dietary choices as part of who you are...can give them real staying power

Habit-forming products often start as nice-to-haves, but once the habit is formed, they become must-haves.

Fogg states that all humans are motivated to seek pleasure and avoid pain; to seek hope and avoid fear; and finally, to seek social acceptance and avoid rejection

Habit-forming products alleviate users' pain by relieving a pronounced itch.

Instead of relying on expensive marketing, habit-forming companies link their services to the users' daily routines and emotions.

For an infrequent action to become a habit, the user must perceive a high degree of utility, either from gaining pleasure or avoiding pain.

If users are not doing what the designer intended (when users are investing time, effort, etc in your product), the designer may be asking them to do too much.