remember to bring the basic shit everyone always seems to forget.
pencils, pens, ruler, calculator, tape, stapler etc.
And i recommend a desk lamp, and a floor lamp. If your dorm has lights like mine did, you'll feel like you're in an office all the time and get sick of it after 2 days. And a desk lamp is just good to have.
And bring one of those fuckin...uh shit what are they...those little spray mop things. My roommate had one. I thought he was a dumbass because he kept it in his closet all year. But then on move out day when we had to clean up, the mop thing might as well have been jesus. It did nothing but help us until we finally put it through too much, and it died.
And as prepared as you are, there will always be some stupid thing that slips through, so be ready to have to replace or buy something.