To succeed at losing body fat, eating right is only one step. You can't eat right but not exercise at all and expect to reduce your bodyfat percentage. You need to do some type of regular cardiovascular or aerobic training.
Cardiovascular and aerobic training is usually called cardio. It's lower intensity exercise sustained for a longer period of time to work the heart and lungs and burn more calories. Running, biking, working out on an elliptical machine, and playing sports like basketball or soccer are great forms of cardiovascular training.