We use(used) Pampers for both our children. Our youngest is still using them.
We use Pampers wipes as well as Huggies wipes(Huggies are thicker).
With Pampers..... there are codes inside each box of diapers(wipes too) on the plastic bags they are stored in for points that you enter into the Pampers rewards program. I've gotten all kinds of things for the kids.... sometimes they have diapers available that you can redeem with your points. Sometimes the packages have coupons inside of them as well.
Be careful not too buy too many tiny diapers... my son came out HUGE... he was in the next size up within a very short time.
Other tips on other products...
We used advent bottles. Advent bottle warmer. We used Carnation Goodstart formula for both kids....If you have a Target near you.... go to the baby section and look on the end of each aisle. Sometimes they will have overstocked clearance items... We've gotten the really large(they had an extra 20") formulas for less that what the smaller cans went for. Same thing with wipes and diapers.
Recently I bought baby clothes...Ralph Lauren, Gap, Children's place,etc. on Ebay.... Some were new...... I paid nearly nothing for these clothes.... That was a great deal since they grow out of these clothes so fast... good tip... if you can keep them in good condition you can turn around and sell them again...... good thing to remember... if you are going to have another child... keep all the clothes, toys,etc.... We did that and I'm so glad we did. We didn't have to buy too much of anything.
Something I regret not doing was taking a video of my babies once they were born. I have lots of pictures(try and take lots of pictures... they grow so fast...).
If you use pacifiers make sure you have extras....
teething medicine...... baby orajel and there are teething tablets that Walmart has that are really great as well.
We washed all our babies clothes in dreft. I'm glad we did. Both of them have very sensitive(inherited) skin. We used that for the first year.
There is sooo many more that I just can't think up right now.... but these are some little things that made our lives a little bit easier.
Congratulations again. The big day will be here before you know it.
Kim