Immediate rewards shape behavior
Small wins, progress bars, and visible completion states can make a session feel worth starting before the larger outcome arrives.
Gamification must clarify the work
Points, levels, and achievements help when they make progress easier to read. They become noise when they hide the next action.
Streak mechanics need recovery rules
Visible streaks are useful only when the system also makes missed days recoverable. The restart path matters as much as the count.