It sounds like you know what you want. The more knowledge of yourself and of how you can manipulate particular variables to best suit your goals, the better. My best advice is to read read read read read, and listen. Mark's blog is one of the best, there are other good blogs, and a lot of people on these forums and other forums have some great knowledge. If you like crossfit and haven't heard Robb Wolf's podcasts that's definitely a good place to check out.
Stabbing conventional wisdom in its face.
Anyone who wants to talk nutrition should PM me!