Im sure you know the basics, carseat and base, stroller, crib, changing table, bath tub, bouncer, pack and play etc.
If you have a boy you will want lots of washcloths to throw over their peepee when you change their diaper so they dont pee all over you.
Aspirator, bottles, get mulitiple pairs of crib sheets and crib pads, changing pad for the table, diaper rash cream, diaper bag, binky holder for diaper bag, small wipe holder for diaper bag, lots of white onsies, baby lotion and wash, boppie or nursing pillow, small toys for the baby, play mat is always nice, recieving blankets, warm blankets, wipe warmer is nice for really young baby, hand mitts to keep them from scratching their face, nursing pads...
I would start buying diapers too so that you have a stockpile supply when you have the baby. I started buying them when I got pregnant each week when I went shopping. I have noticed with my son he wasnt in NB or size 1 size for very long, but he was in size 2 for a little longer and then size 3 a little longer and then he has been in size 4 for a long time. Just as a guide for how much to buy. Also, start buying wipes too, just make sure you dont open them at all so that they stay wet.
Im sure there are lots of other things, I just cant think of them all right now. But there are a few! I would say dont buy too many binkies yet because each baby likes a different type or style of binky. But if you plan on nursing soothies are really good binkies.
Also dont worry about buying all the larger toys like excersaucers and such or high chairs yet because you wont need them for a little while longer. Unless you want to get it all right away.
Good luck with your list, I hope this helped!