Okay, so far it looks horrible, but you can see now a basic eye shape and almost no polygones on the back of the head. For easier modeling I split the head right in the middle by selecting some of the mid polys and use a bandsaw. 
There you go now, if an error during modeling occurs you can cut a half of the head and mirror the other side again and the head will be 100 percent symmetrial again. Lets continue with the eyes, to get the detail you have to use smooth shift, which I used 3 times and moved the new polygons inward to make the eye socket:  
So thats for the polygon mode, press the Tab key and we see how our mesh looks like in metanurbs. Oh my God a potatoe ghost. Okay, I am sure many of you will get a much much better start head then I had, but with some tweaking there you will get a nice result. So let me clean up the mesh a bit... make the eyes smaller and position them:
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