I do TONS of newborn shoots professionally. The #1 best advice I have ever received along the way is that if you are comfortable, baby is freezing (assuming s/he is down to the diaper or less). You should be sweating. I bring a big heating pad and leave it on low and use a space heater. On top of that I put a flat (not fitted) diaper station changing ‘sheet’ (they are about 2 for $7 at Target and washable). Then, whatever blanket/backdrop we want- layer them if you want multiple. All of this is over a bean bag. Baby will be completely moldable because they will be OUT! ALWAYS have baby freshly fed and changed. Other than that, newborn shoots can be some of the easiest. Make sure to get the details- the toes, hands, ears- put them onto something big to show how small they are. And unless you’re doing that- showing how small they are- get SO CLOSE. And for all portraits, focus on a specific eye to get the shot perfectly sharp!