H.C.
The one thing I couldn't have lived without -- with #1 and upcoming #2 -- are cloth diapers as burp cloths. My friend gave me two 12-packs. Supplement with those cotton receiving blankets. We would go through the whole lot in 2 days, especially since our son had reflux. You'll use them for *everything* -- wiping spills, blankets, positioners, napkins (for you! :))...
**The waterproof lap pads are helpful.
**Any piece of clothing you get for a newborn should have snaps down the front. I personally hated onesies and preferred snap-front t-shirts and pants. You will be changing their clothes a lot!
**Rectal thermometer, thermometer covers, and vaseline
**Wipes, diapers (we liked Pampers swaddlers)
**Pacifiers
**Baby shampoo, but we used Dove bar soap for the body. Our pediatrician recommended the lotion (starts w/ "C", drawing a blank) because somewhat neutral for skin.
**Car seat
**Stroller
**Sling is helpful
**Vibrating bouncy seat! (Yes, they can sleep in it!)
Don't stock up on too many newborn/baby clothes. You will be amazed at how quickly they grow out of things in the first year. We have two whole grocery bags of 0-3month clothes from #1. It's also what other people like to buy for the baby.
As for the bottles, we used Dr. Brown's standard (non-wide), which was the only nipple that worked for my preemie at the time. Pain to wash all the parts, and since they have BPA in them we ditched them after a few months. Now using the Gerber standard bottles. The feedback I got was "yeah, nice that these reduce air, but you're going to burp them anyway."