1. When you buy socks, buy packs of plain white matching socks. It's nearly impossible now to find plain baby/kid socks that don't have 3 to 6 unique pairs in a pack. They do this intentionally so when you lose one of those tiny little bastards you lose the pair because there's not another sock to match the "orphan" sock. You're going to lose those things like crazy.
2. Get bottles with the disposable plastic liners. They're awesome and lead to much less gassy baby. Playtex seemed to make a quality unit.
3. If you need a baby swing, get one that alternates from side-to-side to for-and-aft. You'd be amazed how switching directions will calm a fussy baby.
4. Target sells these swaddling blankets that are really thin and stretchy, kind of like heavy duty cheese clothe. They're not cheap, but they last forever and make swaddling a breeze. Definitely worth the $.
5. If your wife uses a pump, you can use FSA or HSA dollers to pay for it.
6. Cook things you can eat with one hand. An easy way around this is to stock up on tortillas and make everything a burrito.