Professor of nutritional sciences, Pennsylvania State University, University Park; author of The Volumetrics Eating Plan
"I'm a woman, so my weight must be an issue! My mother was obese and died of complications from it. I grew up seeing what obesity does, and yet I got quite plump when I first left home and went off to university. Now I have to follow my own advice, or I'm in trouble. I eat a lot of fruits and vegetables to keep me full and satisfied. Starting a meal with a low-cal portion of soup or salad also helps fill me up. It's about strategies. Chocolate is a symbol that I've finished the meal. I like to have one piece of good chocolate from a box. And I swim every morning and run in the pool with weights."