Furnishings
While you may not be into interior design, there is some furniture necessary to ensure at least minimal comfort in your dorm.
Area Rug
Especially if you have vinyl or wood floors, a rug to cover up the cold floors goes a long way to make everythin a bit more comfortable.
Chair / Futon
If you think that comfy desk chair would make studying just that much harder, maybe you'd opt for a futon to add some seating to your room (if you can fit it in...)
Pillows
If you plan on spending any time in your dorm beyond just the 4 hours you sleep, a few throw pillows on your bed will make lounging a lot more comfortable.