Eating lots of fruits and vegetables, whole grains (think: oats, barley and quinoa) and beans can help jump-start weight loss. Why? They deliver fiber, which helps you to feel full on fewer calories. In a two-year study in the Journal of Nutrition, boosting fiber by 8 grams for every 1,000 calories resulted in losing about 4 1/2 pounds. Get the benefits by making room in your diet for these 7 fiber-rich foods that do the weight-loss work for you.