I think the hardest thing about this hobby is regulating your intake. Takes a while to learn the balance but you can do it, and if you are taking a break to repair your grades and stuff, kudos on you. I admire your conviction and the balls to state it right out here on the smoke board. You will be a strong man when you get there.
I abstain a few days a month to keep my head clear and when I do smoke I make sure it's chronic. That weak shit clouds your mind and leaves you couch locked.