I have written more than one book, and I don’t agree with points 4, 5, 6, or 7. We’re all different, and we organize our thoughts and schedules differently. I would say one important thing about writing is to disregard the advice of other people, even if they are successful writers, if you find it doesn’t fit your personal style. Just because something worked for them doesn’t mean it will work for you, too.
I do think you nailed it with step 8, though. But, again, that’s just what has worked for me. I‘m confident that if you log the hours writing, you will get there one way or the other, and that’s the main thrust of step 8. The biggest part of the creative process in general is actually participating in the process and, for writing, that translates to hours spent generating text.