My thoughts would to be to focus on sleeping and walking. Not at the same time though.
Personally, when I'm not rested properly I can't do anything right. I make bad food choices, I can't stay on top of things, and I can't work up the energy to exercise. In the early postpartum period especially, sleep is everything. I had to force myself to ignore the dirty house and take naps and for us co-sleeping resulted in me getting the most hours of sleep possible.
I'm a huge fan of walking as a postpartum exercise because it's low impact, it's easy to start out really slowly, and you can take baby with you so you can go any time. I also love baby carriers for walking (I'm obsessed with wraps and Ergos!) and there are tons of styles so pretty much everyone can find something that works for them. There are also lots of great jogging strollers on the market. I got mine nice and cheap at a garage sale and it was barely used.
The other thing that pops into mind food-wise is to keep lots of healthy snacks on hand. If you're like most other new moms you'll barely have two free minutes in a row to make something to eat so keep things like cut up fruit and veggies or crackers and low-fat cheese around. Plan to eat one-handed a lot.
Hope that helps and have a great time meeting your little one!!!