I have a terrible habit of surfing (no comments about where I am right now!) and it interferes terribly with my study time. I am hopeful that this flowchart might help. Reddit and Pinterest are not acceptable areas for exams. I asked. :-P
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Featured on "Brain-based Habit Formation: Habits and the Dopamine Pleasure/Reward Cycle (change your habits, change your LIFE) ~~~~~~~~~~~~~~~~~~~~~~~~~~ http://addandsomuchmore.com/2014/03/31/brain-based-habit-formation/