Look at these stamps from the US Postal Service!
They're a little bigger than normal stamps, but I couldn't pass them up.
How many things on the "list" do you do?
I try to do all of them, but I do have a really leaky bathroom sink, and some of them I have to do because I don't own a car. It's not really a conscious choice (Have you seen how much parking and car insurance are in Boston?! I almost passed out!) as much as a necessity, but I figure I'm helping to offset the carbon footprint I'll one day create when I do own a car.