My ex-wife used to clean up the house by pushing everything into laundry baskets. Clear the coffee table into a basket. Clear the kitchen counter into a basket. Clear the TV stand into a basket. These would pile up in the basement and every so often I would go through them. In a way it was like a treasure hunt. Lots of phones, remotes, Gameboys, gloves, keys, and of course cash [never less than $50, usually much more]. But what a way to live.
I now live on a rule of "no loose paper." Any paper that comes into the house [e.g. mail, manuals, magazines, et al] goes to my desk immediately where I'll sort it all out when ready. It may take a bit but I will always find it because it can't be anywhere else. And the rest of your house stays cleaner and more orderly.
But my workbench is a black hole. I can set a hammer down and its gone immediately. Maybe we just look past things somehow but parts and tools seem to just take off on their own.
I buy reading glasses constantly [Dollar General is a great source for these] yet they migrate on their own. Lighters do the same thing. I leave these sorts of things in strategic places so they are available when I need them but slowly and surely they ebb away.
And then there are cotter pins. I keep a boxed assortment in my workshop and a select few in the truck. These I seem to hold onto.
End of screed.