Hi Dennis,
for the ear I've gone the same way as it is shown in the Joan of Arc tutorial.
For the head, I've gone my "own" way (because I'm not really at ease with what is described in the JOA tuto. for the head part) :
A 12 segments sphere, adjusted to the background image model, then half cutted. And then of course a lot of insert vertex/slice surface/vertices adujstements
For the hairs, I've just cutted the (half) sphere top, and then tried to built some hairs :lol:
Also, I realized at the end that there were a lot of normals flips to do (not always an easy job).
OL.