Breastfeeding definitely.
Eat well and don't eat anything after dinner. Eat dinner early.
Have lots of sex. Lots of women who are breastfeeding sleep with their baby in bed. Put your baby to sleep in the crib so you can have sex. Then when the baby wakes up in the middle of night bring them to bed with you if you want. But start them in bed, because sex burns calories and makes you feel good.
Get enough sleep.
I think the thing that worked best for me was hiking with one of those child carrier packs. We got one from REI. I tried to go hiking with my husband every weekend. We have this great park relatively near the house that has a really good hiking trail that goes down to the beach. Going up and down that thing with the baby on my back kept me in shape. My husband didn't like it too much though. He swore folks were giving him the stink eye because I was wearing the pack and carrying the baby. We got really good child carriers for hiking from REI. By the time my second came along we each would have one. We used them up till the kids were about 3 or so. I had friends who swore they'd never use one going up and downhill on trails for fear they'd fall but I never fell.
The other thing I liked to do was use the baby for weight lifting. They loved it. I did that up till they were about 3 or so as well.
Get a treadmill and run 1 mile a day. There is nothing like running to take the weight off. And if you have a treadmill right there you have no excuse not to use it. Even the busiest mom in the craziest of houses can get 15 minutes in to run a mile. Eventually running 1 mile becomes incredibly easy to the point where you feel like you didn't even do anything. But it's short enough that you can usually squeeze it in without being interrupted. I use to get up early, while my husband was still home, to get my run in so he could keep the kids out of the room.
Also do house projects. I have trouble getting into videos and exercising in the living room. Although that Billy Blanks Tae Bo guy will kick your arse. But my problem was I never seemed to be able to get through a video without having to stop a bunch of times after being interrupted by baby and/or toddler. But yard work is great exercise and my babies loved being outside in a playpen while I did stuff in the yard. I also would get bored in the house and move all the furniture around on a monthly basis. Paint rooms, ect.
Probably the absolute best thing is having the kids back to back. I was still breastfeeding the first when the second came along. I don't know how anyone could deal with two toddlers running wild and be fat. I barely had time to use the restroom!
Also keep in mind the 5 lb. rule. Per kid there will be 5 lbs that's NEVER going to go away. I don't know what's up with that. I think it must have to do with that NATURAL LAW that Felicity's always going on about.
