Our bodies are accustomed to a certain volume of food, and we tend to eat until we eat enough volume. Studies done at Penn State University have shown that people who begin a meal with a large, low-fat salad or a clear, broth-based soup tend to eat fewer calories than those who don’t have anything before the meal. Use this strategy before a big dinner or a party and have a salad or a cup of soup with lots of veggies before you go. If dinner is at your house, begin with a soup course.