Eric Peniston posed at my studio and I did this little sketch. Sometimes I like to sketch right inside a beat up old framing mat as it helps me compose. I may start out drawing in the middle somewhere and shift the sketch around a bit until the open space in the mat window is pretty much filled. It is like a strategy game that eventually reduces the drawing to its final form.
I do these sketches on the train or bus, but for later reference I sometimes snap a picture. Sometimes I like to do something more finished later. The sketches help establish a compositional idea.