For those who have everything: Loc8tor Lite

The credit-card-size Loc8tor Lite helps keep track of easily misplaced items. Weighing less than an ounce, it comes with “two mini homing tags small enough to hang on a key ring or hide in a wallet.” Using audio and visual cues, the device will guide you to within an inch of your tagged items. “Don’t lose it, though.”
Price: $79.99 Contact: Loc8tor.com
Source: Financial Times