Whats the quickest way to lose baby weight after you have a baby?

I gained a LOT of weight with my first baby and it took me a year to get it back off. I had an emergency c-section with him so it took me a while before I could start exercising or anything like that. I'm going to try a VBac this time, but theres still a chance of another c-section. I haven't gained as much with this baby, but I'm really feeling fat and just want to get back into shape ASAP after this one is born. What things can I do to lose weight after baby that will not be too strenuous if I have to have a c-section. Thanks!