4. Eat more vegetables, fruits, whole grains, and beans (including soy). Studies show that these plant-based disease-fighters make up only 10% of the calories in the American diet. Plant-based foods are high in water and fiber and essential vitamins and antioxidants, yet very low in calories. Diets high in plant-based foods play a key role in the prevention of diseases, including obesity, heart disease, certain types of cancer, and type 2 diabetes.

"When going out for fast food, I used to get the large-size value meal. Now, I satisfy a craving by ordering just one item: a small order of fries or a six-piece box of chicken nuggets. So far, I've shaved off 16 pounds in seven weeks, and I'm on track to being thinner than my high school self for my 10-year reunion later this year." —Miranda Jarrell, Birmingham, AL
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