So, now (on the back) there are not 10, or 21, but 18 "Secrets of Successful Story Structure." And we all know that this is somewhat arbitrary because as you dig into a few of those so-called secrets they get bigger in terms of how they are applied. For instance, some people say that the Protagonist must be likeable. I'd say we must identify with him or her, which means we have to like them enough to follow and be intently interested in their decisions and outcomes. This is covered under item 17, and if you break that down there are over 20 techniques to help the audience identify with any and all of your characters. You don't use all of them... but the more the better the identification.
So, for what it's worth....and I figure each is worth thousands of dollars if they are understood and applied... on the left they are for FREE. AND THE LINK. (scroll to the bottom)
Your comments and improvements are always welcome.