A bunch of women at the office are doing Weight Watchers. I am impressed by their willingness and ability to allow such structure to guide their daily eating habits. I could never do it.
Over the past year and a half or so, I have worked the supply (food) and demand (exercise) sides of my body's metabolism to become healthier than I was. I'm in decent, but not great shape and I have lost about four inches off my waist, but still have a gut. Still, I am healthier than I was a couple years ago and that's a good thing.
Here are some tips culled from WebMD: