I won't lose my key now!

I keep all of my keys in a small safe-like device that I carry with me. If I happen to lose my keys, there's no problem because they can't be accessed without a fairly large amount of effort, and perhaps explosives.

 

I affix the key to this lockbox to my left earring, so I always know it's safe. It has the added bonus of being hyperfashionable, too! Who needs zippered jackets when you've got dangling keys?

Done