Balled up foil makes great dryer sheets and eliminates static.
You can sharpen your scissors by cutting up foil!
Wetted foil can be used to scrub off rust stains from metal.
Brown Sugar Softener
Wrap up your hard brown sugar in foil and bake it to soften it up.
Wrap foil around the tops of your bananas to keep them fresh longer.
Triple A batteries can be used instead of Double A if you put some foil on the positive ends.