Ha, ha, I’m loving this thread. I do some of these things myself, without giving it a thought, really.
I reuse ziplock bags (unless used for meat or something icky), I reuse socks as cleaning rags, save margarine containers, (for leftovers that might not get eaten, then, when they go off, I toss the whole thing, no disgusting dish to clean, yeah!).
My husband and I buy almost all our clothing second hand, once we started it just saved us so much money we never looked back. Fancy clothes, not so much, but the day to day, definitely.
My husband is a cheap guy by nature, truth be told. Once, when we were traveling in Indonesia (when the Rupiah was something like 1700 to the dollar), he picked up a small aluminum coin,(I can’t even remember the denomination, but since they had 100 Rupiah notes it had to be some minuscule amount), from the gutter! Seriously how cheap are you? A few steps down the road he tried to give it to a beggar, who promptly threw it back at him! Why yes, you are the cheapest man on earth.
I worked in a bar owned by an Eastern European man, very frugal. At the end of the night, he’d return unused ice, from the bar well, to the ice machine. We tried to explain that he wasn’t saving anything, but he never quite got it. Cheap bastard!