Getting around campus can be tricky at first. Don't forget your key, your ID! Don't get locked out. Don't let strangers into your dorm. Also walk in buddy groups after dark, etc.
College Kids need to be hydrated and caffeinated. Period.
Maximize the tiny space to the best of your ability.
You'll want your technology safe from damage/theft. You'll find outlets are few and far between, and not easy to get to.
In a standard dorm, your bed is where you'll spend most of your time. Studying, sleeping. It will be your couch when friends come over. Make it cozy!