Recent studies prove that snacking on the right foods at the right time can turn your body into a fa t-burning machine. Get your metabolism going with a pre-dinner snack, 1-2 hours before your main meal. Doing so will help you stop eating once you're full, which is sometimes hard to do. The key to snacking is to keep the snack light so you won't overdo it, but to make it hearty enough that it will satiate you. Also, aim for a snack that's 6 grams of fiber, 10 grams of protein, and ends up being under 200 calories. Get started with this recipe.