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Before you hit the 4th of July picnics and get tempted by all things patriotic and delicious (think coleslaw, potato salad, pie, burgers and more), do your body a favor and get your metabolism in gear. Turbocharging your body's personal calorie-burning system can not only help you lose pounds but can also be as simple as catching a little shut-eye or sipping a cold drink. For 15 ways to speed up your metabolism, click here.