Oh, I find myself doing all sorts of things to stop from losing things.
When I wear my contacts, while putting them in, I always have a white towel draped across the sink. That way, if I drop it, it falls on the towel. The contacts have a blue tint and are easily seen on the towel. Can't see them that well when they drop in the sink!
The jar next to the sewing machine happened by accident. I happened to have the jar sitting there one day, I think it had some buttons in it. I was cleaning my machine and taking the screw out. I saw the jar and thought putting the screw in there would be safer instead of letting it just hang out on the table.
I guess I'm just an "odd duck" as my dad would say.....lol