Step one...reclaim your body. You only get one...make it last. Do you really want to be tired? Do you really want to be sore and out of breath? Do you really want to have a hard time chasing your kids or playing with them? Do you want to miss out on life?
Exercise even when you don't feel like it. My goal is 4 to 5 days a week for an hour at a time. Soon I'll have a exercise meter on my blog to show how many hours I have logged since my heart attack. We hired a personal trainer and one thing she told me that stuck was to "push it to failure". That is my mantra for improving the level I'm at and moving to the next level.
It's not easy. But the alternative is worse. I have 2 toddlers. One has been teething all summer. I have a heart that is still healing. I'm up during the night and have to wake up at 5:30 to get a work out in. That means sometimes I need to go to bed at 8:30 or 9 so I get enough sleep. It's tough. But it works. I've lost 17 pounds since January. I can do push ups now. My stomach is flat after 3 pregnancies. I couldn't run before but now can go 3 to 4 miles on an incline. Go in baby steps but KEEP PUSHING! It's worth it.