Cheat Sheet

I just went to Target to buy a gift for my sister's baby shower (I won't say what I got in case she reads this before Sunday) and realized that I have NO CLUE what I am going to need for my little girl (or boy)! YIKES! I guess I have some homework to do...but I'm keeping my sister's registry as a "cheat sheet!" Any suggestions on things that are "must have" and things that are "can do without?"