Focus on consuming entire, unprocessed foods, such as fruits, vegetables, and whole grains, while planning a nutritious diet. Avoid processed meats, fried foods, sugary snacks, and foods high in saturated and trans fats. Get regular exercise: Aim for 30 minutes daily of moderate-intensity activity, such as brisk walking. Try high-intensity interval training as well, which alternates brief bursts of vigorous exercise with rest periods.