Dressing gown for yourself & dh! Something easy to wash.
Thermometer for bub.
The childhood illness book I was given is like a bible to me.

Basinnett sheets & waterproof barriers - I bought a really expensive brand but well worth it as its "staydry" for the baby.

baby monitor + breathing monitor (I'm a bit paranoid) - it let me rest a bit better

Floor waterproof rug for playtime.
playgym for playtime.

Film & batteries for camera