Ive mentioned this before in other threads… 
Ive been character modeling for years and Ive taught it for years.
Generally I find that people doing this fall into 4 categories;
- Total newby who has little 3D experience and a limited art background. This is probably the most common one I have run into.
- Newby to 3D but has a pretty good art background. This is the 2nd most common type I run into.
- Experienced in hard surface modeling ie mechanical or architecture stuff or non organic plus some kind of design background/web graphics etc. A lot of this type are people doing logo animations etc etc.
- Experienced in 3D with an extensive art background. Good artists with an understanding of form and flow. This is the most rare type I run into.
I have found that people who fall into the first 3 categories have the most trouble with the point by point method of modeling. The reason is that most of these people are trying to learn 3D as well as the artistic/anatomical principles that will drive the 3D modeling. They generally dont have a strong art background and have a lot of difficulty figuring out the proper proportions. Most of the tutorials Ive seen start out with an eye and a face is slowly built up by detailing out. This can work well for an experienced artist who already knows and understands facial proportions but fails most of the time for those who dont know where theyre going before they even start.
Most good drawing books start with the big picture then works into the details. This is the way most traditional drawing or sculpting courses follow. This is a tried and true approach that has worked for centuries. One of the methods I teach my students starts this way with only a single polygon and slowly builds into the details mimicing this more traditional approach.
Its worked very well and is easy to remember and repeat. Its been the most successful approach Ive seen for people learning to organic model things like heads.
People who fall into the 4th category (experienced artists) can generally use any technique and make it work. Experienced traditional artists find the technique I use very familiar and take to it quickly.
Again I have some quicktimes up on my site showing the technique in the early stages plus how to control the flow in a face.