Do you mean while in the hospital or once your home?
The main things you'll need are a place for your baby to sleep, a swing or bouncer for when you need to get other things done, car seat, stroller, amples amounts of diapers and wipes, pacifiers (buy different kinds just in case your baby has a preference), bottles, a pump if you plan on breastfeeding or formula if you don't, burp cloths, bibs, receiving blankets diaper bag, rash cream, and bath supplies. For you, you'll also want extra heavy pads, breast pads, comfortable clothes, and nipple cream if you plan on breastfeeding.