...and hilarity ensues, I suppose!

HAVE SOME OPTIONS:

1) Late night corridor patrolling - gotta make sure there aren't any first years sneaking around where they're not mean to be.
2) Time to eat - breakfast, lunch, dinner or even a midnight snack; studying burns a lot of energy, and you have to replenish it somehow!
3) Hogsmeade excursion - are you going to spend all your sickles on sweets? Really?
4) Studying - in the library or in the common room. Got to keep your grades up somehow!
5) In Class - passing notes is only bad if you get caught, clearly.