Yesterday I watched The Hero's 2 Journeys by Michael Hauge and Christopher Vogler. Awesome stuff. Inspiring and helpful. The visual quality of the video isn't the best but that wasn't what I was interested in so it was, at most, a minor irritation.
As I write this I'm thinking of a story I wrote years ago when I was a teenager and how I felt there was something missing from the climax but I couldn't pin it down. I finished the book but something stayed with me, a niggling doubt. Well, now I think I might know what was wrong. I had completed the hero's outer journey, but I had left the inner journey unresolved.
I can't recommend these videos highly enough to writers.