I try to get any piece of aluminum foil, paper towel or parchment paper to give its all. In this Food for Thought, I tell Nancy Leson how many uses I got from one piece of plastic wrap. I was proud.
She was disgusted.
It's not that I'm all that eco-conscious or even that I'm cheap (though I am). I just can't see throwing something away that's still useful. Take foil. If I've used a sheet and it's still clean (enough) I save it. There's all kinds of stuff you can do with used foil.
Same for paper towels. If it's been used for mopping up plain water, I save it for a dirtier job next time. When a small piece is all that's needed I tear off just that much. The Hillbilly Housewife has even more ideas for re-using paper towels. Nancy cleverly saves the cardboard from used up paper towel rolls as a stash for washed ZipLocs.
Like me, Nancy's husband Mac re-uses paper towels. Only difference being I store mine on the roll, he uses their little compost container. And Nancy just loooooves her can collection.

In this episode I brag about the multiple uses I got from one piece of plastic wrap. DeGroot gave me a major eye-roll on that one, but that just made it more fun.
"Use it up, wear it out. Make it do or do without."