I've been working on some recycled jewelry cards/holders for the upcoming Dunwoody Art Festival this May 7th and 8th. Jewelry cards make it a lot easier to keep track of your inventory, because you are looking out for a 2 1/2 inch to 3 1/2 inch card instead of a tiny little trinket that can easily get misplaced. I find the benefits are really worth the effort put into making these, esp. since they are recycled and help with branding.
I hand-carved my stamps from a tree design that I've been wanting to use as a logo for a while now. I learned stamp carving and basic printmaking in college, but you can find a really awesome hand carved stamp tutorial at Geninne's Art Blog.
Some views of the recycled-ness, from the side. I choose to fold my cardboard over for a more uniform look, but you could always let the print show through. Customers usually really appreciate that they are reused.