To make the head a placed a cube on the top of my characters head, and extruded several sections out, before removing some polygons and welding up the gaps. I was just improvisng when making the hair as i wasn't sure at all how i wanted the end result to look, but i'm extremely pleased with the hair shape.

When i finished the hair i made a few test renders, and widened the jaw slightly. I feel the head is pretty much done at this point.