1. Maintain a healthy weight.
  2. Check your waistline.
  3. Eat mindfully. Emphasize colorful, vitamin-packed vegetables and fruits; whole grains; fish, lean poultry, tofu, and beans and other legumes as protein sources plus healthy fats. Cut down on unnecessary calories from sweets, sodas, refined grains like white bread or white rice, unhealthy fats, fried and fast foods, and mindless snacking. Keep a close eye on portion sizes, too.
  4. Exercise regularly. Aim for 2½ to 5 hours weekly of brisk walking or try a vigorous exercise like jogging for half that time.

Keep a watch on your cholesterol, triglycerides, blood pressure, and blood sugar numbers.

(Source: Harvard)