Slip on shoes, yes - and peppermint oil capsules. Can't recommend them highly enough. If you get trapped wind, you will want to shift it as quickly as possible, and they are fab.
I think I took in a couple of books and magazines... which came in handy while I was waiting for a slot in theatre, but once I had my baby, I spent the 2 days I was in hospital sort of going 'WHOAH, A BABY!', and I don't think I did any reading.
I would say, take some ear plugs if you on a ward, and an MP 3 player. It just helps drown out the sound of other people if you need to.
Take a flip top (sports cap) large water bottle too, so you can get people to fill it and leave it on the bed near you. You will drink a lot, but hospital cups are tiny, and it's a pain if you have to keep flagging nurses down to bring you water.
And lipsalve.
I didn't get skin to skin until recovery room, but it must have been less than 20 mins, and DS was right beside my face in a little blanket, so I could touch his face. Then in recovery, I stuffed him down the front of my nightie, with him in just a nappy and a hat, and he had a boob in his gob about 5 seconds after that. Still EBF at nearly ten months.
My planned Cs was calm, relaxed and great, really. Make sure you know what painkillers you are taking when, and stay on top of the schedule (make sure you know when your next dose is supposed to be, and ask for it promptly if it doesn't turn up).