Put a tiny bit of toothpaste into a small cup, mix in one teaspoon baking soda and half a teaspoon water. Thoroughly mix then brush your teeth for two minutes. Remember to do it once a week until you have reached the results you want. Once your teeth are good and white, limit yourself to using the whitening treatment once every month or two.
To all my friends moving into college. This is how to move your hanging clothes! Put a rubber band around the hangers and put a trash bag over them! A big black trash bag works the best! Now you don't have to take all of your clothes off the hangers, fold them, and the re-hang them when you get to you dorm room!