Teeth whitening treatment at home. Put a tiny bit of toothpaste into a small cup, mix in one teaspoon baking soda plus one teaspoon of hydrogen peroxide, and half a teaspoon water. Thoroughly mix then brush your teeth for two minutes.
Seems nearly impossible to me. But it's definitely something to work on: Eat two food from each color food group Every day. Instead of food groups think of making your plate look like a rainbow. Eat the rainbow!