#1 - Flushable wipes!!! Even better than soft toilet paper IMO
#2 - Camera
#3 - My own pillow - I slept so much better when DH bought it to me after the first night
#4 - Breastfeeding Naturally - book that came with my ABA aubscription for all those BF questions I had when the midwives were busy
#5 - Mobile phone / laptop with internet access - to stay connected to BB and keep me from being bored in the mornings before my hordes of visitors arrived

ETA: my list is really all for post birth stuff - I didn't really use much during labour - my hubby and the epidural were my favourites then though