I used to be pretty fat. One day, I told myself I wasn't going to be fat anymore. Started doing some light exercise (push-ups, sit-ups, jogging, squats,) all that sort of shit, and I lost 70 pounds. I'm slowly, ever so Haruhidamn slowly, starting to put it back on. It's been almost three years now, and I've gained 25 pounds.
I'm thinking about starting back up, but it's way too much of a hassle.