Findit Key Finder
Lost your car keys again? Not only are replacement keys expensive, but it can take hours for a locksmith to come to the rescue. This unique keychain comes with a receiver that attaches to your keys and a credit card-sized transmitter that stays in your wallet. If you find yourself fishing for those keys, simply activate the transmitter by pressing a button, and the receiver on your keychain will sound an alarm.
To buy: $25, containerstore.com.