Item 4 is one I've seen elsewhere: https://www.amazon.com/Invisible-Ink-Practical-Building-Reso...
In fact, I recall a Pixar writer said it was one of his favorite books.
Actually, I found it (same blog):
https://www.aerogrammestudio.com/2013/03/22/the-story-spine-...
Apparently the author claims neither he nor Pixar came up with it.