I think there's plenty of available advice on how to become ultra-rich. Just look at the Business section of any bookstore. The problem is that this advice typically takes you from a 0.001% chance of becoming ultra-rich, through sheer lucky accident or lottery, to a 0.1% chance, through strategy and calculated risks.
I'm not arguing that it's not really hard and really improbable. However, folks tend to assess P(becoming wealthy by any means) ~ P(winning the lottery).
If it's worth saying, but not worth its own post (even in Discussion), then it goes here.
(I plan to make these threads from now on. Downvote if you disapprove. If I miss one, feel free to do it yourself.)