Upcycling! When I spot interesting images from mass mailers arriving in my mailbox, I like to craft them into something. Making envelopes is easy. You can use templates bought at a craft store but you can also trace around any envelope that came through your mailbox and use that as a DIY template too. The envelope in my first photo was created that way. Now don't you feel like crafting this weekend?
(Photos taken with my iPhone)