Turn a wire hanger to a shoe hanger. Very cool.
Handy and cheap
DIY cat litterbox
Homemade Ice packs: 1 part rubbing alcohol to 3 parts water, gets really cold, but never hardens so you can manipulate it. every athlete (or mom) should pin this!
Dryer cleaning - "You would NOT believe the amount of crud we got out of our dryer! This is a MUST DO! I'm sure it will dry much faster." Main cause of dryer fires - built up lint inside dryer.