To keep your heart healthy, here are six simple suggestions. 1. Keep exercising, try to avoid sedentary habits, and keep exercising. 2. Regular physical examination, regular physical examination can promptly discover physical problems. 3. Quit smoking and avoid second-hand smoke. Smoking thins the blood vessels leading to the heart, brain and other parts of the body. 4. Decompression, keep a happy mood and adequate sleep. 5. A diet good for the heart. 6. Ask about family medical history.