Ever pick up a ring of keys and wonder where they all go and what they open? Or worse yet, spend five minutes trying to open a lock, in the dark, late at night, during a downpour? Color-coded keys make opening locks a breeze. Just put a dab of the same color paint or the same color adhesive dots on corresponding keys and locks. At a glance, you will be able to find the one you are looking for, no matter how many keys you have on your ring. You can forget memorizing shapes and special names on various keys. Just connect the dots. And that's the On The House tip for today.