You won't use half the stuff you pack. I packed a ton and only used deodorant, tooth brush/tooth paste, a hair clip, slippers and an extra shirt. The hospital provided me with pads, comfy underwear. You can pack books to read if you want...but you'll be busy catching up on sleep and taking care of your new baby.
A few of each, body suits, baby grows, cardy or jumper,coat, nappies, energy drink and a snack for you like crisps, sweets, dried fruit anything you like that won't go off! Muslin cloths, breast pads, bottles if not breast feeding, night dress or pjs and a couple of changes of clothes for you in case you end up staying in! Then you can add stuff like dummies, wipes, dressing gown, your own pillow if you want