Check out pintrest they have a lot of good things to pack
I have my iPod with various playlists of instrumental music. Phone chargers. 2 tennis balls in a long sock for massage. A long sock of rice to use as a heating pad. Lavender and clary sage and rose geranium essential oils. Snacks for papa, hard candy for me. Clothes for all of us (plus mittens and blanket for baby.) Diapers and pads and nursing pads. Pillows and towels in the car in case theirs suck too bad. A robe. Nursing bras. Toiletries for papa and me. Swim trunks for him. Bikini top for me. A battery operated fan.
I definitely over packed...and barely used anything I brought. All you need is an outfit to go home in...comfy shoes/sandals...a few toiletries (tooth brush...tooth paste...deodorant etc) clothes for your husband/boyfriend...and a outfit for your baby to go home in. Hope that helps.