100%
A printer. There were many times when ALL of the printers in the library were down on a deadline day. There's is nothing more worrying than running around trying to find someone with a printer. It's also easier for printing out handouts etc. There's also nothing worse than walking to the library when it's chucking it down or snowing. ¬¬
A full length mirror! When I first started they only provided me with a mirror in the bathroom. How they expected girls to curl/straighten their hair I have no idea. You also can't check out your outfits and make sure everything goes without a full length mirror.
Plain white t-shirts. It sounds stupid but if you don't have a primark close at hand it can get expensive buying white t-shirts. I have used 10 this year for things such as fancy dress, UV paint parties and white t-shirt nights where everyone signs your top.
Sunday move in's If you're moving in on a Sunday (like I did) then either pick up your basics (milk, bacon, butter etc) on the way or the day before. Guaranteed by the time you get there the supermarkets will be closed or your flatmates will want to bond and you'll go hungry.