Now looking from the side extrude all the the edges marked.
Now here i've imported a old base ear of mine its always usefull to use parts of other models, it saves time, the ear will be in another base mesh in just a sec.
In the picture i've attached the ear, and selected al the edges at the top of the head and extruded another line, and here's another Mesh update, with the ear attached. Base Mesh 14.
Extruded another line of edges at the top.
Extruding more edges to form the shape of the back of the head.
Now extrude a line down the neck.
Now extruding from the back of the back.
Extruded down the back of the neck.

 

Here's the mesh so far I will be using the Maya script Connect Poly Shape soon if you've never use it I suggest you check out the site by the guy who made it, you can download it from their and theirs also a good cps modeling lesson on their Link, I will be using csp to mirror copy the other half of the head so I make sure my points are at the middle of the gird using the snap tools, mesh update Base Mesh 15.
Now I've selected all the vertices like in the picture above and will be using a lattice to get the shape of the head.
Now I've started tweaking the nose using my reference pictures, there's enough points their already to achieve a good nose but I will add detail to it later once I'm happy with the shape.