I will just list my whole list, even the obvious stuff since that's the stuff you always forget!
Clothes/underwear/socks
Shoes/slippers
pillow
medicines (enzymes, prandin/insulin, tylenol, nexium, puffers etc - not EVERYTHING, just PRN sort of stuff)
qtips, shampoo/soap, razor, toothpaste/toothbrush (if you don't want to use their stuff)
comb/brush, hair scrunchee/headband
paper/pen
phone/PDA/Laptop
something to do: knitting, book, sudoku, gameboy, etc <img src="i/expressions/face-icon-small-smile.gif" border="0">
FOOD! snacks and drinks, mainly
Hmm I think that's all. Pretty much I pack for the hospital like I would for a vacation. If I happen to be too sick to use all the stuff when I first get there, then I still bring it to look forward to for later. <img src="i/expressions/face-icon-small-smile.gif" border="0"> It's just easier to bring comforts of home than have someone have to get them for you later. I do set out an extra stack of clothes at home though, somewhere conspicuous. That way if my stay gets extended, it's easy for someone to go grab me some new clothes.
Hope you feel better!