There are so many lists online to tell you what to bring to the hospital. You won’t use most of the items on those lists. These are the things that I actually used at the hospital.
nursing bra
two comfortable shirts
two comfortable pants or shorts
warm socks (if winter)
snacks for your partner or anyone who will be with you at the hospital
a going home outfit for baby
toothbrush
toothpaste
comb or brush
ponytail
shampoo
something to do during and/or after labor (ipod, kindle, smartphone, etc)
You don’t really need to bring:
underwear (sounds weird I know. But they will give you this mesh underware and a pads for the bleeding. You don’t need to bring your own)
meals for yourself (I have a special diet so I brought a ton of stuff to store in the refrigerator/freezer on the floor. But each day, they gave me a menu and I just noted that I needed a gluten free version, and they fed me very well all three meals each day)
a ton of clothes or diapers for baby
a baby blanket (unless it is winter and you will need one to cover the car seat)
towels for showering
pillows (Unless you are really picky about your pillows, they provide you with a few at the hospital)