Don't forget!

The most important thing to remember in the first few weeks of being alone with your baby: YOU HAVE TO EAT!
In the very beginning, there is a swarm of people surrounding you, wanting to hold the baby and hopefully making you some chicken soup. But after about six weeks, you will inevitably find yourself alone sometimes. Maybe even for a whole day. As you are trying to understand the rhythm of life with your new baby and how to juggle showers and laundry with feedings every two hours and five poopy diapers a day, you may reach 3 in the afternoon and realize you have not eaten.
And this may be the most important thing you do for yourself because if you are not well fed, you will not have body strength or mental lucidity to make good choices for your baby.
Eat well. Sounds easier than it really is. What do you eat? When do you have time to prepare a healthy meal? How do you not just grab five chocolate chip cookies for breakfast?
You keep healthy foods in your house that you can grab and eat.
Grapes. Baby carrots, popcorn, bananas, cherry tomatoes, good whole-grain cereal like total and honey bunches of oats(not cinnamon toast crunch or trix), raisins for your cereal, cold cuts and cheese, rice cakes, peanut butter, yogurt, hummus. Keep frozen strawberries on hand and throw them in the blender with milk or orange juice and a banana. Make these items part of your grocery list and just plain leave out the cookies and ice cream for a while. If you don't, you will end up eating these all day because they are easy. But the foods mentioned above are easy too, hardly require any preparation and are HEALTHY!
Soon, you will find a balance and you will learn to do almost everything with one hand while you carry your baby. But for now, concentrate on getting enough rest (nap with your baby) and eating well. The laundry will get done. Your strength is more important.