What makes Greek yogurt a delicious tool for weight loss is its protein content. It has twice as much as other yogurts. "Protein takes longer to leave the stomach," says sports nutritionist Leslie Bonci, MPH, RD. "That keeps you satisfied longer." As a bonus, Bonci tells WebMD, the body burns more calories digesting protein than carbs. Non-fat, low-fat, and low-sugar types keep a slim profile.

One of the best sources of protein is fish. Studies show it's more satisfying than chicken or beef, probably because of the type of protein it contains. Most fish is low in fat, and the exceptions usually have a healthy form of fat -- omega-3 fatty acids. Omega-3's, which are found in salmon, herring, and other fatty fish, appear to help protect against heart disease and other chronic conditions.

Studies suggest cinnamon may have a stabilizing effect on blood sugar levels. This could curtail appetite, particularly in people with type 2 diabetes, Bonci says. Nearly everyone can benefit from cinnamon in its traditional role. Stir some into your coffee, tea, or yogurt to add sweetness without adding calories.