Lollipop to keep your mouth moist - your partner can pull it out of your mouth during contractions.
Breath mints for your partner - you don't want him counting in your face with stinky breath.
Wristwatch with a second hand for your partner to time contractions
Small electric fan to keep cool
Pretty, soft socks to keep your feet warm
Playing cards or board game to keep busy when the epidural kicks in
Pillows if you would find your home pillows more comfortable
Phone Numbers of Family & Friends
Snacks and beverages for your partner along with spare change for the vending machines
Change of clothes and toiletries for your partner- it may be a long time before he can go home.
Camera. Make sure that you have approved all photos first before your enthusiastic partner goes home and e-mails everyone you know. Labor can leave you not looking your very best.
Toiletries: hairbrush, toothbrush, lip balm, deodorant etc.
Newborn Diapers - although hospital will most likely provide these for you
Going home outfit for mom - something that would have fit you at about seven months pregnant, unfortunately
Going home outfit for baby. Better yet, pack two, you don't know if there will be a spit up or diaper blow out incident as you are packing to leave.
What Not to Pack: The hospital will provide all these things, childbirth is a messy thing, let their things get dirty and keep your nice pajamas for when you get home.