Things you may want to bring:

Bedding for a regular twin bed
Back rest/floor pillow
Storage trunk
Under bed storage bin
Laundry basket
Laundry detergent
Drying rack
Waste basket
Iron
Towels
Bathrobe
Flip flops for the shower
Shower caddy
Bulletin board with thumb tacks
Fun Tack
Dry erase message board
Desk Lamp
Alarm clock
Power strip
Three-prong extension cord
Can opener
Dishes, utensils, pots/pans

Things you may want to coordinate with your roommate:

Refrigerator
Run (10' X 11" fits)
Stereo
Television

Things not to bring:

Curtains
Halogen Lamps
Microwaves
Other cooking appliances
Candles
Pets (except fish)