A natural way that has been proven to help whiten teeth is to use a mixture of half baking soda and half salt. You can apply it to your toothbrush and brush your teeth the way you would if you were using regular toothpaste. Make sure you do not swallow.
If you have or are planning on getting Invisalign to enhance your smile, I recommend that you wait until after your treatment to start whitening your teeth. If you do this, you can save hundreds of dollars on the whitening process by using your Invisalign aligners as trays for your whitening gel.
Getting teeth that are white is actually more simple than it seems. Since this determines how you feel about yourself and how other people feel about you, it's important to have white teeth. Using the tips above you will be able to make sure your teeth are always white and pretty.