Here you got the base head i created following the tips of "blender cookie" video tutorial: "Blender Topology Colection: Head Overview" created by
... Really usefull for beginners and for use as starting point of all your creations.
Her I left the link for the tutorial:
http://cgcookie.com/blender/cgc-courses/learning-mesh-topology-collection/
I love it, the topology is amazing, thanks for share !!