The amount of water we drink in a day and the kind of food we fill our plate with plays a major role in our health. For optimal health, it is important to have at least five to eight servings of fruits and vegetables each day. Vegetables like broccoli, cabbage, carrots, tomatoes, and fruits like watermelon, berries and cherries are considered good for health. Also, increase your intake of omega-3 fatty acids, which is found in walnuts, fish, soybeans and pumpkin seeds.