One way I combat paper clutter is to go through the mail immediately, sorting any junk mail right into the paper recycling. (Reducing this would be another post -- we don't get a lot but we do get some junk!)
Anyway, I'm going through the mail yesterday and I paused as I almost placed one unopened envelope into the recycle bin. I'm not sure what it was that made me stop, but I decided to open it. From the exterior of the envelope, it appeared to be some unwanted solicitation. No company identification, a preprinted bulk mail postage. All the evidence pointed to it being junk.
Imagine my surprise when I opened it and found our $10 Amazon certificate, a part of Coinstar's annual December promotion. I had *almost* put that in the trash! I guess someone was watching out for me, just at that moment. Now we have that $10 waiting for our next Amazon deal :)
I guess the moral of the story is OPEN everything you think is junk mail. You never know what good surprises may be inside!