I think you baited your line here to catch a minnow, but the answer is at least whale-size.
Like, if the entire publishing and book marketing industries could be boiled down into a repeatable checklist... I mean, there are $1000 courses that try to outline this process in a useful way, with mixed results. Let alone an ebook, let alone a humble forum thread.
The trick is that no two authors are alike, even within the same genre-- different goals, different experience levels, different resources. Pick any given tactic/platform/tool (including ALL of the ones you put forward to start off the conversation), and you'll find 100 authors who say it's a complete waste of time, and 100 rebuttals from other authors that are making it work, and probably 1000 of us that are somewhere in between and trying to figure it out.
Also, new tools become available every month. Hence 2,000,000+ posts on kboards over the years, and 60,000+ here so far, just trying to hash out what works and what doesn't and how and when and why.
The best we can hope for in terms of a checklist is "here are some things you could try if you wanted to". And to get at some of those, google "book launch plan" and be prepared to sift through 95% chaff for the 5% that applies to your situation.
