Don’t know where I’ve been, but I just discovered this craze called “Zentangle” (visit this blog for some more info Zentangle). I like the idea of getting lost in the act of doodling. It seems a little prescriptive, in fact, there are web pages about how to make the library of various marks which all have assigned names. However, for the naive and amateur sketcher, I can see how it may be helpful to have an index of doodles from which to select and combine. I might try it with my students too.
(June 10, 2011) As a follow-up note, I assigned some zentangle doodling as a side project for students to work on in between other projects. Here are some results: