Scott Moehring on moehrbetter.com:
When I read GTD, there was an existing flowchart, but I wanted to make my own. It was supposed to be just for myself as a GTD binder cover insert. When I was done with the design, I was so happy with it that I shared it with David. He liked it and put it on his site as a free downloadable file.
Not new, but I crossed this great printable PDF before and lost it. Posting mostly as a note-to-self.