Ask for a scopolamine patch before being put under - for nausea it works great!
I took my own decaf tea bags that I like, biotene for dry mouth, chapstick, slippers and a robe for walking the halls. A leisure bra because it won't rub on the incisions, I wore the same outfit home that I came in, (well except for undies), phone/charger, shampoo n conditioner, toothbrush, toothpaste, lotion, deodorant - that's really it.
Good luck! You will soon be on the other side.