I made some more progress this evening, here is how it looks on my easel now.
I am going to kick up the color quite a bit more next.
To see step by step progress photos read on after the break, make sure to
Here I blocked in the eye and intensified the shadows.
I worked in some color in the midtones and a little more shadow detail.
In this frame I darkened the background and refined the overall shape of the head.
Brushed more color on the background
Here I added some textural spots on the face in green and reshaped the nose and face a little.