What is something extreme you do?

What are some extreme anticonsumption habits you have? Share your ideas bellow, I will say two things I do that can be considered cheap or extreme.

When opening plastic containers that have milk cream or jelly, I usually take that small part of aluminion foil of it and then I wash it and wipe it, to save it for future ideas.

When dealing with old furnitures that are falling apart, I remove the screws from it and save them for DIY projects, sometimes I even save the old nails and I straighten them afterwards.