I do all of these things except cutting up rubber gloves for elastic bands, I never thought of that one.
I save loo roll tubes, I shred any paperwork too personal to go into the recycling bin, stuff the loo roll tubes with the shreds, wrap in a small piece of newspaper, then save them for DD to use as firefighters for her wood burner, sometimes I put some odd bits of dried spice or herbs in them.
I save yogurt pots cut them down in strips to the bottom, then use the bits as labels for seedlings in the greenhouse .
I also slice any unused lemon, orange, or lime, pop it into the freezer on a tray , then when frozen put into a bag, then put a slice of it into a G and T and use the orange in lemonade or Pimms.
Batch baking and freezing of course.
Save any cardboard to make into little pots for seedlings, or old magazine pages.