Although everybody who has commented here has valid points, I think balzaccom makes the most important connections. Get in 2hr of good, hard aerobic exercise every day (I'll say 5 days a week minimum), and cut back on calories. It will be a bit of a fight at first (from personal experience), but there is a HUGE list of benefits including being in better shape. The good and hard part is relative of course and one needs to build on a foundation. Right now I typically do 6 to 8 miles a day (1.5 to 2hrs) with 12 pounds on my back and it took me a year to build up to it.