I would never lose my keys again if I had 'Cucampre' by Olavo Machado Neto at home. This genius little key holder allows you to organize your keys with its cleverly-labeled columns, and it even doubles as a coat rack.
You can hang your keys in either the house, car, couple, or home column, insuring that you will never grab the wrong set of keys in an important situation again. 'Cucampre' by Olavo Machado Neto will keep you (and me) from being locked out of the house at 2am on a Saturday night. Hopefully.