This most excellent list of 101 New Uses for Everyday Things contains a great selection of household hints and tips. You’ll know some of them of course, but I kinda guarantee you’ll find new ones which will surprise ya. Baking soda as an underarm deodorant? Whoa.
Prevent frost from accumulating inside car windows. Rub the glass with a solution of 2 teaspoons of salt in 1 gallon of hot water. Wipe dry.