Habit can be my friend.
[ hab-it ]SHOW IPA
an acquired behavior pattern regularly followed until it has become almost involuntary:the habit of looking both ways before crossing the street.
customary practice or use:Daily bathing is an American habit.
a particular practice, custom, or usage:the habit of shaking hands.
a dominant or regular disposition or tendency; prevailing character or quality:She has a habit of looking at the bright side of things.
addiction, especially to narcotics (often preceded by the).