First and foremost take time to look after yourself,I know the baby will ask for more than 24 hours a day :).Take mom's time when you have dad or other family members to change diapers.

1.Enjoy a wide range of foods. Even during nursing, your baby is becoming familiar with and learning to like the flavors of the food you eat.

2.Consume plenty of water (12 cups daily). Meals rich in carbohydrates, protein, fats, vitamins and minerals will help with your energy level and overall health. 

3.A good portion of your meals should come from complex carbohydrates, such as whole-grains.They provide vitamins, minerals and fiber.

4.Protein foods are rich sources of minerals, like iron and zinc, along with some vitamins

5.Fats are also important for a healthy eating plan.

6.3 fruits and 3 vegetables daily.

7.3 servings of dairy foods daily.

Sources:

complex carbohydrates----rice,cereals,carbohydrates,whole grain bread.
fat----canola oil,olive oil,vegetable oil,nut butter(peanut etc.,)[get trans fat free]
Protien----poultry,dried beans,eggs,milk,yogurt,tofu.
minerals----iron and zinc will be found in protien substances,some in fruits and vegetables.
phytonutrients----fruits,vegetables.
Vitamin D,calcium----dairy foods

Know these:
1.Slow weight loss is healthy after the birth of your baby
2.Regular exercise as directed by your physiotherapist, for your lower abdomen and upper abdomen is also necessary.(exercises will be soft until first 6 months after your delivery)
3.Walking and swimming must also be very gradually increased after delivery.
4.Even after your daughter is a toddler take mom's time ,free time, asking dad to take her shopping.Even in the sleeping time of baby you got to be quiet.So its a really leisure time,you will enjoy being you.