Just some general tips;

I usually start making the ears using nurbs curves and lofts when i have finished the basic lofts i template the meshes(there's a shelve button for it or i use layers) and start tweaking the curves.

I usually start from the sideview, using the create polygon tool (keep in mind that you're roughing out the shapes so keep the number of points at a minimum)tracing the outline of the head, which basically creates a big face, then i extrude the face and then delete the face, then i extrude edges letting the front and side image guide me, when the head is taking shape i use a mirrored smooth proxy at start tweaking whilest looking at refference pictures(see picture for example)

And last; Learn Nurbs, i to absolutely hate them because once you screw up it's back to the drawingboard, but if you master them your modeling will improve.