Save that bubble wrap you get in packages! It's pricey if you have to buy it and it really does come in handy for all sorts of packing things to mail, and packing up little delicate objects. I use it to pack away my sensitive pickup for my autoharp when I am not using it, so it doesn't get knocked. You also can use squares of it to temporarily stop up the drainage holes in your bathtub to have a fuller bath!
I would re-use the bubble wrap---but I can't resist popping the bubbles as soon as a piece hits my hands. The noise, the bubble bursting --- great stress reliever!!!