Let the writer take up surgery or bricklaying if he is interested in technique. There is no mechanical way to get the writing done, no shortcut. The young writer would be a fool to follow a theory. Teach yourself by your own mistakes; people learn only by error.
I think this is the most important point about writing craft. And most people who call themselves writers aren't, because they simply don't write enough. I've been on a few writing forums in my time, and only one was good, because it made the writer write, write, write. On all the others, people hardly produce anything new; they just keep rewriting and rewriting the same damned thing. You aren't going to learn anything that way.