At work, we have a container of used pens, pencils and other writing supplies. Some of them were left behind by those who left the company. Others were randomly found in the office. I try to be good. I don’t go for the new supplies. I use black, blue and red pens (one each), one sign pen, two pencils, and one permanent marker. When they run out of ink or dry out, I go back to the container. They’re still useful, after all.