As I get my packages ready to mail out to family and friends across the US, I came across this idea on the USPS website, and am going for it!
(Notice the reusable bag? See the tutorial here)
If I had fragile items in my shop, I'd switch over to this for my business too.
Some of my bigger packages are getting re-used amazon.com bubble packs and bubble wrap. At least re-using is better than buying new, I figure!