One of my favorite H2O2 remedies is my homemade toothpaste. I take one part H2O2 and two parts baking soda (the measurements don't really matter, just get a consistency that you like). Stir them into a paste and brush as usual. It's a great fix for bad breath and whitens teeth just as well as those very expensive whitening kits, but with absolutely no pain. Another great recipe is for bad body odor. Take equal parts baking soda, H2O2, and water. Add a bit of dish soap and mix together. Scrub any place that the stink won't wash off. This remedy is great for athletes and sick people. Also works for people who have been skunked (it actually gave me the idea).