Here’s another page from my sketchbook.  This was done in the small village of Aurel, France.  I took in the scene, and looked for a combination of shapes and values that lead my eye.  The arrow drawing on the right is the desired eye path, and the end point, which I assumed to be in the window of the lower-right.  A center of interest that is centered on thirds (top-third, lower-third, both vertical and horozontal).

In the bottom drawing I drew the composition and kept notes on the scene. It was really striking.  This is something I can take back to the studio and paint.