Snack on tahini dip. Tahini is made from sesame seeds, a rich source of zinc. And zinc may increase the production of leptin, a hormone that improves metabolism and curbs appetite.
Chew a stick of sugarless gum. A New England Journal of Medicine study found that this mindless activity can help your body burn 19 percent more calories per hour. (At that rate, if you chewed gum every waking hour, you'd lose 11 pounds over the course of a year! And likely drive everyone around you nuts.)
Go for a brisk 15-minute walk. A trip around the block can triple your metabolic rate. This boost continues after you stop moving because the body consumes more oxygen, a crucial player in metabolism, when it's recovering from exertion.