Load up on low energy density foods, like vegetables, fruits and fat-free broths. A few minor tweaks can lower the energy density of your favorite meals, too. For example, substitute a half-cup of spaghetti and a half-cup of spiralized zucchini "zoodles" for a full cup of spaghetti. Or make a chicken, vegetable and brown rice soup instead of serving grilled chicken with brown rice and veggies; the broth is often very low or virtually free of calories, lowering the energy density of your meal, so you may fill up on fewer calories.
Want a flatter stomach? Look in your glass—milk and soda are two major causes of tummy inflation. Approximately 65 percent of the human population has a reduced ability to digest lactose after infancy, which means that your glass of warm milk before bed may be the reason you wake up with too-tight pajamas. And when it comes to soda, both regular and diet are belly busters both from the sweeteners used and the carbonation. Try eliminating these from your diet and see if it helps flatten your tummy.