Sometimes you actually have to finish something before you really understand the process. My first novel was a great example of this principle.
Some background: I wrote what I thought was a detailed outline and character description before I started on the first draft of Pursuit of the Heliotrope. I finished the first draft, and it just barely reached 50,000 words. And, to be honest, by the time I was working on the last third of the book, I was feeling pretty tired of it and definitely wasn't doing my best at that point. And I wasn't even really crunching to finish it! I just found it hard to maintain interest in writing the same thing for such a long period.