Ah how exciting! Good luck with the op, I also started to worry the day before my op about the small things but the whole experience was actually enjoyable so try not to worry. Things I would receommend taking are: Hair band with no metal in, cosy socks/slippers, dressing gown, magazines/book, baby wipes, your bra for afterwards, make up remover if you are going to wear make up there, comfy clothes to go home in, some snacks you think you might fancy after the op xx