Hospital bag stuff that we used:
For us:
Fuzzy socks - My feet get cold easily.
Slippers - You had to have footwear to walk the halls.
Cherry Lifesavers - I like having candy around.
My own water bottle - They give you a cup but I'm a heavy water drinker and prefer my own bottle.
Clothing to go home in - Pajama pants and t-shirt was what I wore.
A small bottle of conditioner - The hospital had shampoo but my fine hair needs really good conditioner.
Lip balm - You'll have dry, cracked lips from the air in the hospital.
My own pillow - I'm seriously picky about pillows so I brought my own.
Camera and video camera - You'll probably take about a million photos - you will look rotten in all of them

A book - TV gets boring to me.
Small bills cash for hubby - He'll need some snacks at weird hours.
Spare shirt for hubby - He camped out in our room and it was nice for him to have a fresh shirt.
For baby:
Going home outfit - You probably bought this right after your gender scan!
Photo outfit - If you think that you'll want to buy the photos. We took about 100 of our own so we didn't buy.
Velcro swaddle - We were too new at swaddling to get it right immediately. The velcro swaddle was super easy to do. I highly recommend a velcro swaddle.