I got this cool book, it's called Drawing on the Right Side of the Brain, it's about drawing what you see and goes over perspective, proportions on the head and portraits. I really like the way it explains that drawing isn't just a natural talent and it CAN be taught, if you take the time. It gets you to think about it in a different way...
Oh and I may have to post some of my old VS new stuff I saved quite a few drawings.