Here is a handy tool that lets you organize your gear on your smartphone. Just put RFID tags on your gear and you can rely on GearEye to track everything on a smartphone. You will know quickly when something is missing. GearTags are easy to apply and affordable.
When you are missing something, you can use the “locate” option to find it. The developers also have a smartphone case that uses your phone’s sensors for tracking. What do you think? Are you sold on this idea?