This article offers suggestions on avoiding the dreaded freshman 15. And it amuses me because it left out the number one weight-gaining activity for all college freshman:
I have a fair amount of friends that packed on the pounds because of weekend pAArtying the entire semester.
But most of this stuff doesn't explicitly apply to college. Just helpful hints on good eating habits. Although the mini fridge suggestion is brilliant. Honestly, you will be amazed how few items you can fit, it really causes you to prioritize.