Does anybody know a good way to whiten your teeth naturally?!

Does anybody know a good way to whiten your teeth naturally?

I brush my teeth after every meal and never had a cavity. However, my coffee addiction seems to be staining my teeth a little.

Indeed coffee will do that. Assuming you don't read other posts on this site...some people say strawberries are a natural way to brighten teeth. I could not find any scientific literature that would back this up. People where saying mush up strawberries and brush them onto your teeth. I am sure the bacteria on your teeth enjoyed this treatment enough to cause some cavities!
There is no natural way to safely and effectively whiten your teeth. Other people would say use baking soda and peroxide. But again, these compounds have not been shown to do anything for your teeth. Only change the taste of certain toothpastes. Using Baking soda would be more abrasive than normal toothpaste and that just strips your teeth of their enamel. Hydrogen peroxide is hard on your gums. Hydrogen peroxide will whiten teeth if it is kept next to your teeth for extended periods of time. H202 kept near your gums for extended periods of time will really damage your gums.