Divide Light from Dark

Here is an example of a simple drawing exercise that I learned from Perry Stewart while I was in college. He referred to it as "shadow massing". The idea is that you are to draw the shadow shapes only. The idea behind this exercise is to train your mind to see the shapes of values. In this case the shapes of the shadows. The same exercise can be done for the lights, except you draw with a white pencil on toned paper.