10 of 14

Eat right

Eating a balanced diet—low in red meat and processed foods, high in fruits and vegetables, poultry, fish, and whole grains—will not only keep your weight down but also have a more direct effect on the heart’s functioning: It keeps your blood sugar stable throughout the day so you can avoid destructive peaks and valleys. "Eating a more balanced diet with complex carbs means you’re going to be stable throughout the day," Dr. Simmons says. "You're not going to have a carb high, then a drop down. Your mood isn’t going to fluctuate."

Healthy eating can help prevent or delay diabetes, a major risk factor for heart trouble.

Next: Seek help for depression