Run More

If your goal is weight loss, you must burn more calories than you take in. The bigger the deficit (caloric deficit) the more fat weight you will lose. To optimize the time you spend trying to create this deficit, run. There are few things that burn as many calories as running does. Biking, sports, elliptical training, and many others certainly are good and burn calories, but they don't work as well as good old fashioned running.