Everyone has given such great suggestions but here are a few more
A small dry erase board for the door of your dorm room. Everyone had one when I lived in the dorm to leave little notes to each other and to let people know when they were in, out, studying, etc. Also some under the bed rubbermaid storage containers. I had a ton of clothes and it always helped to store bulky, out of season items (i.e. sweaters) under the bed where they were out of the way. Also it is really important to keep track of all or your paperwork (bank statements, phone bills, registration forms, etc.) and I got a manilla envelope for each major area (Financial Aid, Bank Statements, School of Music--insert your major area of study there, Miscellaneous) and kept all documentation in those folders. This way it was neatly filed and always at my fingertips.
Also dont pack to much decoration stuff. Definitley take stuff to personalize your space but you're going to accumulate SO MUCH stuff. Especially by joining a sorority. Rooms in Tutweiler are small (I've stayed there before) and it can get very crowded very quickly. Also someone mentioned double sided tape...I used this stuff called sticky tack (or something)--it's yellow and about 99 cents a package---to put stuff on my dorm walls. It comes off without taking up the paint and you don't have to use very much.
Good luck, Liz---you're going to have a blast