Several weeks ago, I lost one of my CompactFlash cards. I keep two spare ones in a small pouch. One night, after uploading some photos to my computer, I couldn't find one of them. There was only one left in my pouch. I looked under the coffee table, I looked in my camera bag, I looked under the couch, I checked my pockets. Nothing.
I have this reclinable couch with fixed cushions, so I assumed maybe it fell into my couch and was gone for good. My place is also a bit of a mess, so maybe it was just under a pile of magazines somewhere. I just hoped it'd turn up before my next vacation, or I'd have to buy a new one.
* * *
Last night, I was again uploading some pictures, and I lost my other spare! Wtf! My pouch was just empty! I checked my camera bag, though, and I immediately found it! I had mindlessly stowed it directly into my bag without putting it in the pouch first.
...
*EUREKA!*
I suddenly realized that this was also the most likely scenario for how I lost my previous card. I searched my camera bag more thoroughly this time, and I found the card I lost weeks ago buried at the bottom.
* * *
I had been so convinced of the couch theory that I just gave up my search before and didn't take other theories seriously. But once I found the second card I lost, I gained renewed confidence in the camera bag theory and focused there.
An interesting lesson!