I could start a whole comm on the subject.
Took the plastic holders that we sold sprinklers in and use them to root 21 plants at a time.
Made a sweet display rack from an old pallet. I can go on for ages about pallet uses.
Saved my bread bag for next time I need a food bag. I never purchase plastic bags except for the trash can and aluminum can recycling.
Used the black and green nylon twine that came wrapped around various products. Made new canoe handles (braided) and plants hangers (with an artfully bent, white coated clothes hanger).
Have a huge pile of 1x2 treated wood pieces that were used to pack lumber. Still working on ideas.
I save McDonald's cups for starting plants. Tough plastic, not too UV sensitive.
Shove styrofoam in a pickle jar with a dash of unleaded, boom, ya got napalm. You can start a soaking wet camp fire with that shit. Save your dryer lint while you're at it.
Show me a pic of any packaging, I'll give you a use for it.