I'm in the hospital now, had my surgery yesterday) and so far I used only my toothbrush, toothpaste, hairbrush, deodorant and phone (obviously). And I'll be wearing home the same clothes I came in with.
But I still think that you better pack everything you think you might need (like chapstick, charger, may be mouth spray) that people also posted above, because you never know what you'll need in your particular situation. Good luck!