It turns out that these little people need kind of a lot of stuff. We're not swimming in dough here but we've managed not to go bankrupt while still providing for the little guy. I'm still learning as I go, but I've adapted a few thrifty ways.
Amazon Mom
This membership is free to join and is basically "Amazon Prime" for a few months. However, you have to order a certain amount from the 'baby' section to continue enjoying the benefit of free shipping. I didn't quite keep up with that, but it was fun while it lasted. I do enjoy the "Subscribe and Save" feature for diapers.
Zulily
This site sends me an email every day of the deals they have for that day for baby, kids, and mom stuff. I haven't bought much, but when I do, it's been 50% off the retail price. This is great for buying baby gifts. If you do decide to join, the link above is a referral so I could possibly get some $$ if you buy something . . . share the love!
ThredUP (also a referral link)
I've joined but haven't used this site yet, although it looks fun. People fill boxes of their (hopefully) gently used baby clothes and toys that you can get for $5 + shipping. It's also a good way to pass on your baby stuff you are done with and make way for new stuff.
Baby Cheapskate
I'm sure there are tons of websites like this one out there . . . this site outlines baby deals as they come out, whether it be the latest price of diapers in stores or online, or clothing discounts and sales.
Friends and Family
My sister-in-law is our most valuable resource, since she has given Bo 50% of his wardrobe. Bo's two boy cousins are so sweet to pass on their stuff! :) Since he grows out of his clothes so quickly, this has been really wonderful. Bo's grandmas love buying him clothes, too. We have been given several items from friends who's kids have outgrown them and are borrowing some items. This works for us right now because we don't really have the space to store baby stuff and we know we'll be moving soon, so it's less to take with us.
Thrift stores/garage sales/Craigslist
To be honest, I haven't really used these avenues a ton, but I've seen stuff out there! A month ago I saw a nice looking exersaucer (nicer than the one we had) for $15 at a thrift store. Matt wouldn't let me get it because he hates giant plastic stuff (and we already had a free one), but it was in great condition. I found it at Babies R Us for $90. So obviously, that would've been a great deal! Our Craigslist is wild . . . for example, I just found a 3-foot tall blow-up m'n'm . . . for the low price of $30 . . . why in the world would anyone want that? And a crib for $300. And a breast pump for $50. I just can't imagine buying a breast pump from someone on Craigslist . . . however there are some good deals out there. And it's always hilarious to look.
What are your saving secrets?