It's happening much too often as I'm working on my spring cleaning. Way too often...
You ask "What?"
The finding of something 'put away' in a not often used place, then promptly forgetting I ever put it there! When I come upon it again I say to myself "OH! There you are!" The biggest 'lost zone' is a cabinet on the backside of my kitchen cabinets. It was in there I found my large Tupperware pieces and all my grilling pieces.
To solve this issue, I took photos of what is in this hidden space and posted it on the inside of one of my cabinet doors. It reminds me every day they are back there. I'm going to take some more photos of other hidden areas and post them too.
Hopefully this will keep me on-track!