Good for you!
I myself decided it was high time to stop living a life of lethargy and self-indulgence, so it's monitored caloric intake and workout regimen from now on.
We're on day 3 of the diet, but the regimen is in its third week and going well. I can do 50 pushups now, which is 38 more than I could do when I started. Basically, if I make it to the weight most of you started at, I'm golden