Seriously, my must-haves are: clothes(duh! lol), diapers, wipes, blankets, carseats, carrier/wrap, possibly a stroller, boobs or a bottle(and pump), nursing bras/tanks.
Now, to get more in depth, my list goes like this: teething tablets, coconut oil, corn starch, gentian violet(for possible thrush outbreaks), california baby shampoo. And seriously, some type of white noise. White noise has saved my life, just as much as my wraps and carriers have. lol