1. Choose a fiber-filled diet, rich in whole grains, vegetables, and fruits.
2. Drink plenty of water during the day.
3. Make sure not to neglect carbohydrates, as they are a primary source of energy. Whole grains are a very good source.
4. Make sure to eat more vegetables and fruits.
5. Do not eat too much junk food, as they are not beneficial to your health.
6. Make sure to eat foods raw (or lightly steamed) if suitable/possible. Cooking destroys some nutrients, and some foods are still unsafe to eat without cooking first, so check first.
7. Limit red meat, and avoid processed meat. Eat some lighter colored meats, such as poultry, as well as fish.
8. Choose healthy fats, limit saturated fats, and avoid trans fat. Do not completely neglect fats a whole, though.
9. Choose foods low in salt.
10. Make sure to have a good intake of vitamins. Take dietary supplements, and read the food labels on what you buy. Also, you may want to ask a nutritionist for advice.