I’m looking to educate myself on some of the fundamental concepts and principles followed by traditional sculptures. I want a better understanding of the thought processes that help empower you guys to look past the details and get things correct early on.
Such concepts as Mass, Volume, Form, Planes…
That kind of thing.
Does anyone have a recommended reading including books, websites, forum posts, or tutorials?
Thanks!
Oh man, I have to do some self-promotion here! Check out my site, www.zbrushworkshops.com. Building a bridge between traditional and digital is sort of my thing.
Good luck with your sculpting. 
I have bought two sculpting courses (traditional sculpture) from this website:
http://www.onlinesculptureclass.com/
Blake (the teacher) is very helpful, reactive and kind. I recommend it to whoever wants to sculpt
Objective Review (customer!): Ryan’s tutorials are excellent! Just check out his generous free tutorials on his website and here thru Zbrush Central and you will see how well paced and packed with information they are. He has a great teaching style.