ebates.com is an incredible website I found for getting a little something back from purchases you will already be making. It is free to join and they will give you a $5 credit for signing up. To use it, log-in to your ebates account and then click the link to whichever website you will be making a purchase from (there are THOUSANDS) and you'll be surprised how much you can get back.
All of this being said, another website that I love is Diapers.com . When you're new, there are codes to receive $10 off and if you are referred by someone (me :D) you can receive another $10 off. They accept manufacturer's coupons and typically have good deals anyway. In addition to all of this, for orders of $49 or more (the total BEFORE discounts I might add) shipping is free and I always receive my things the next day. Log-in using your new ebates account and you'll get even more back. My referral coupon code is AMAZ8319.
I hope this helps all my friends, not just the new moms. Have a great day!