In the 1940s, noted scuba diving enthusiast and bald science fiction writer Arthur C. Clarke came up with the idea for the telecommunications satellite. Others took his idea and ran with it, culminating in today’s reality show saturated media universe.
In that tradition, I would like someone to run with this idea:
Socks that match themselves.
The socks would contain RFID tags that, when coupled with a sound-making device, would act as homing beacons to direct you via sonic cues to their matching counterpart. All you’d have to do to ensure your socks always match is pay a small child, or if you’re a cheap bastard, train a dog, to use one sock to track down the other.
It would also be great if the sonic cue was some sort of fart noise.