I wasn't allowed to bring any valuables, so no computer for me. However, I did bring light reading matieral, so I wouldn't be bored (nothing too heavy, cuz I knew I would be on drugs). I brought my own hygiene items, cuz I am picky like that (Colgate rather than Crest (pphtueee!), good shampoo, etc.), and I made sure to bring lotion and chapstick. I was very glad for the lotion and chapstick. Don't forget to leave your jewelry at home.
Good luck! See you on the loser's bench!