Socks - I found my feet got cold at night and when the fluid retention hit post c/s I couldn't wear slippers for a few days.
Laptop and if you have your own wireless connection so you can surf the net during those loooooonnnnngggg evenings
Pressie or something to occupy the older sibling when they come and visit
Lip Balm
Hair ties
Breast Pump - if you have your own
Favourite Pillow - I hated sleeping using the hospital pillow
Comfy stretchy leggings or pants and tops