Before you get started, do try to communicate with your roommates on a common color or print for your dorm room. Look for items that aren't costly because you may have a new roommate next year. Ideas can be found on Pininterest and there are tons of items in stores like TJ Max, Walmart, Target, Ikea, and CB2.
Make sure you come equipped with your personal bathing essentials. Get a shower caddy to hold your matching towel and wash cloth set with your favorite soaps and smell goods. Don't forget about a robe and shower shoes.
Get your staplers, hole punchers, laptop holders, desk lamps and other needs so that you will be equipped with what you need to get started on the right foot.
harmony with your roommates side of the room.
Wall decals/applique, posters, and picture collages are an easy way to jazz up those unsightly walls.
throw pillows of contrasting colors or prints and walla....
privacy you may want to incorporate a room divider by hanging beads, a curtain or just placing a tall bookshelf in a location to separate your side from your roommates side.
Drapes, Shades and beads will do the trick but don't forget about window frosting.