Brush your teeth with Baking soda to remove stains and whiten teeth. Do this about once a week. It really works.

Another method to improve the whiteness of your teeth is using baking soda and hydrogen Peroxide. When using this mixture you do not swallow and you must rinse out your mouth well. This procedure is especially good at killing bacteria and preventing mouth ulcers. This tip has been recommended by many of the Easyways visitors, however results are mixed.

Here is another tip sent into the site.....
Mix one part baking soda and one part iodized salt, add water to make a paste. Spread this one your tooth brush and brush as normal. This will remove plaque as well as whiten teeth. By all means, do not swallow this. Also, do not use this very often as it will make your gums feel raw. Once a day is fine unless you experience rawness, then decrease the use to every other day. Enjoy!