Walk. I spent two weeks in Vegas and lost twenty pounds. Twenty fucking pounds in two weeks, can you believe that shit? I wasn't drinking pop and eating pizza either. Oh, and cutting out the pop really helps. A 2-liter of pop is around 1000 calories. A 2-liter of Vault, for instance, has 960 calories in it. Don't eat so much fast food, cut back on the pizza, and take a walk. I know it's gay as hell, but trust me. I was a little overweight before I lost this twenty.

Points:
-Don't drink pop, drink applejuice or low-cal drinks.
-Fast food is a no-no except maybe 3-4 times a month, and cut back on pizza
-Walk
-If you do this for just 2 weeks, you'll see a huge difference. Carry it on for six weeks, you'll drop 30 pounds easy bro.

And that is the weight-loss program of a stoner. PS. Walking really fucking sucks, but it's better than riding a bike. Just walk like a half an hour a day.