I found this tutorial pretty helpful simply because of the fact that you said not to use heavy, stiff strokes when drawing hair. Since hair has fluidity in its' movement, you have to have a fluid hand as well. Thanks for the tutorial! ^_^
The only question I have (because this was quite informative) is regarding the "clipping group" bit, is the layer 9 linking to the layer 5? I never use this function because I couldn't figure out how the layers linked together.