I've always used baby shampoo (Johnsons) on Colton. Ever since his first bath (about 3 weeks.. thats how long it took for his cord to fall off, speaking of: DEFINITALLY buy a bottle of rubbing alcohol for the cord. Take a small needle and poke a hole in the top of the alcohol (through the foil.. DONT remove the foil) and use that to pour alcohol on the cord. Colton's took forever, once I started doing that it fell off in 2 days!!!! You just have to pour the alcohol around the cord, down into the belly button then wipe off any excess alcohol on their belly, and rub down around the cord.)
Anyway.. on with the shampoo; I wouldn't buy a bunch. Colton's almost 7mo and we have only used 1.5 bottles so far. You barely use any because they are so small, with little to no hair (most of the time
).
As far as diapers go, you will probably go through about a case (or box, usually have about 150-200 diapers) of 1's, at least. Colton was 9lbs 14oz, and still used a case of 1's. I would only buy a couple packs of newborn though, because any unopened packs you can always return (on your trip to buy more.. lol).
Definitally buy lots of sheets. You will need them. Colton wasn't really sickly, but now that he is older (and sleeps 9hr+ at night) he tends to pee ALOT! Which normally leaks out onto his sheet
and therefore his sheets need to be changed almost EVERY night!
Lots of receiving blankets/covers. Colton used receiving blankets all the time when he was smaller, and they were good for burping, wiping milk off his face when he was eating, and all sorts of things because they are decently priced, and alot bigger than burp cloths. Now he doesn't use them as much unless it's chilly and I want something thin over him in his carseat, or if it's too hot for his blanket at night but I want him covered. Although, now he does use bigger blankets to sleep with (although some people are against giving babies blankets, so your decision) and goes through about 3-4 a week.
Also, make sure you have some fragrance/dye free laundry detergent and a good stain remover! You will need them! Even if s/he isn't a "sicky" baby, EVERY baby spits up. And like it or not, your destined to have lots of poo incidents!