If you're like me, tartar buildup is your nemesis. No matter that I brush twice a day and floss, that stupid tartar accretes on my teeth like cat fur on black pants. Since I was at the dentist getting a cavity filled, he clued me in on this great (and cheap) way to polish your choppers.
Once a day (before bed, I think), pour a few spoonfuls of baking soda in your hand. Dip a wet toothbrush into the powder and brush away! Sure, baking soda is a pretty salty and you don't want to swallow it. However, the effectiveness of this technique is pronounced and it is well worth the mild discomfort.
Just another tip from your old Uncle Joe.