The post on this blog that gets the most hits is the one on doodling.
NPR has a story on doodling with some interesting insight.
I like to doodle. I'm a squiggle line doodler. Nothing frame worthy. I go over the letters in my notes, darkening and outlining them. Sometimes I sketch the person speaking. If the speaker catches me staring and drawing, and staring and drawing, it's a little uncomfortable. Usually the sketch is not flattering.
Now that I know, if NPR is to be believed, that doodling helps the mind concentrate on the speaker, I will doodle more freely.
Text messaging, however, during meetings or conversations leads to precisely zero comprehesion of what is being spoken in the room.