As A Stain Remover
Baking soda is the miracle of miracles. Besides being great at cleaning and solving most all of your life’s problems, it is great for immediately removing any dental stains you may have. Simply pour a small amount into your palm and then dip your wet toothbrush into it and brush. I wish I took some before and after photos because after only one brushing my teeth went from having minor funky stains to being a pretty pretty clear white. I’m very glad that I didn’t go straight into using whitening strips before I tried this cheaper method. Baking soda has the abrasive quality that cleans teeth really well, but leaves my teeth feeling very very clean, without any residue. It freshens breath as well. As stated by the comments, you shouldn’t use this treatment regularly as it will wear down your enamel. It should be used for occasional stains as the most effective quick fix!
As a Facial Scrub
I personally don’t really like using the sugar scrubs sold at most body shops because the crystals seem to be too coarse and rough on the skin. Instead, I use a little baking soda mixed with Cetaphil’s Gentle Cleanser (which is more buttery than my normal cleanser) when I want a fine exfoliation. It leaves my skin soft and lightly buffed.