When I was growing up, we used to keep a backdoor key in our garage, just in case I got locked out. That said, I did have to break into my house a couple times, though it was usually only a partial success—I could get into the basement, but the door from there to the house proper was usually locked. And after the time I accidentally broke a basement window trying to break in, well, that was less of an option too.
The $50 Digital KeySafe is designed to prevent just such a jam. It offers a compartment in which you can leave a spare key, and secures it from would-be thieves with a numeric keypad (powered by an included 3v lithium battery, which hopefully won't explode). An activity log also shows you the last nine attempts to open the safe, including date and time, so you can smile as you see recount little Johnny's desperate try to remember the secret code.
If you prefer the cheaper option, you can always pick up the magnetic Stor-a-Key for $4. Or the ever popular fake rock route. Nobody can spot a fake rock. Or—and this is radical, I know—you could remember to take your keys with you .
[via Gizmos for Geeks ]