Since this is a specific and recurring kind of annoyance, at least for me as my brain enters its twilight years, I thought I'd start a separate thread for it.
Where did I put the backpack I use for marketing? It isn't where it goes. I know I brought it back from the Greenmarket this morning, because I unloaded my purchases into my refrigerator. But then where did I put the backpack? (Yes, I looked in my refrigerator.)
How could I lose a fucking backpack? Where could I have put it that can't be seen?
I rarely carry a backpack, but recently had one packed to bursting with dry cleaning and vegetables. Stopped for a drink on the way home. Next morning, can't find this over-stuffed backpack. Looked everywhere. Damn, must have left it in the bar.
But wait: I cooked and ate the vegetables last night.
I had unpacked it, put everything away, and neatly stored it--and don't really remember doing so.