Put a tiny bit of toothpaste into a small cup, mix in one teaspoon baking soda plus one teaspoon of hydrogen peroxide, and half a teaspoon water. Thoroughly mix then brush your teeth for two minutes. Remember to do it once a week for pearly whites :)
Tutorial on how to properly clean your makeup brushes. (T of white vinegar in a cup of hot water, 20 minute soak; hot then cold rinse and pat dry.) Disinfects, dissolves grease/makeup, leaves no film, and inexpensive.