A very simple file folder made from empty cereal boxes & scrapbook paper. made these from the supplies below. it was free for me because i already had all of these things, but the spray glue alone is about $7....so it may be a project of convenience for me, others may be better off just buying some folders. However.
simple steps: cut box (as shown along the dotted lines). spray glue, add scrapbook paper, wrapping paper, etc. and ta da! something for "to file, to mail, to copy" and what have you.