Dear Mommies & Daddies +Guardians

I have a question, (Sibilings, Aunties, Uncles, and Grandparents) welcomed here as well :) . What are some things you have forgotten to buy or put on your registry for your newborn and-or yourself post pregnancy? Also, what are some things a new mom may not know to buy that she may need or any weird things she may get caught off guard without at any given moment?..Hey, any odd deets about a newborn/post pregnancy in general will be appriciated as well.