@jym626 makes a great suggestion on what NOT to Bring:
http://talk.collegeconfidential.com/parents-forum/2011338-roommate-brought-22-pillows-4-lamps-7-towels-and-a-large-ceramic-pineapple.html#latest
I forgot to add, your priority should be the bedding.
Those dorm beds can be horrible. For sanitary reasons they are very plastic.
My children typically brought the egg shell foams, waterproof pads-yes accidents happen with soda soak throughs and other drinks- and a sturdy mattress pad with good sheets.