We have covered various item trackers such as TrackR bravo here in the past. If you have a few of those already, you can use TrackR atlas to find out where you have put your items. To get started, plug the atlas device into a wall socket in each room, attach Bluetooth tracking devices to your favorite belongings, and let TrackR atlas to do the rest. It will detect your items and maps out which rooms your they are in.
You will be able to ask your phone where you have put your items. You also get notified when your belongings are moved. This WiFi enabled system is getting funded on Indiegogo.