Dyna Moe at Nobody's Sweetheart is putting together an Improv Infographic that explains a Harold. Roughly in the form of a flow chart, all the phases (beats) are illustrated along with an indication of the flow, timing, and points of focus. It's a pretty fun graphic although she hasn't finished it, yet. It's possible that she'll do other graphics on the elements of a scene. If she decides to make these into posters, I'm buying some!