—house security door key
—front wooden door and garage "shopper door" key
—office mailbox key
Bonus question(s): do you have a special/novelty keyring or key chain thing? Do you hang your keys from a belt loop on your jeans/trousers like the scary authority figures in ET?
*Don't expect many DiSers to know what this is, but basically it's a key you use to unlock the doors to your car and to turn the ignition.