I'm not that good in drawing but I still sketch all my photography projects. It helps me to visualize the main graphic components of the picture. Here we have two little sketch I made while preparing two Clownville images.
The brown spot on the Mein Klown sketch is 100% italian espresso.
Clownville series can be found in the Project section of my portfolio: http://www.eoloperfido.com/projects.html