Quoting Will☮Creedence:" Go on target.com and sign up to make a registry. They have an entire checklist of everything you'll need ... [snip!] ... add stuff to your registry it'll be easier for you to keep track of it later on and you can go back and look at what you liked."
exactly! thats what I did and it prevented me from over buying. also my suggestion is if you are having a baby shower, wait until after for the smaller purchases (clothes, diapers, wipes, etc.) because you may end up with more than you use. I bought everything I thought I needed with my first by the end of the second trimester and had tons of stuff. With my second I waited until the first part of the third trimester and still had more stuff than I needed. I am waiting until about 35 to 36 weeks with this guy. (except a few things just in case)