Febreez my friend. Sir Stinks-a-lot will get the idea when you unscrew the cap and pour it on him. College roomate from hell resulted in me seeing the results of that one first hand.
I really don't think you have much to worry about. Study hard, stay ahead of the class in your nightly reading, ask lots of questions (there is no such thing as a stupid question) and don't forget to unwind for an hour every night. You'll do just fine.
Good luck, we're all counting on you.