There’s a short passage in the book “Moneyball” that can be paraphrased and applied to solopreneurship.
Think for yourself along rational lines. Hypothesize, test against the evidence, never accept that a question has been answered as well as it ever will be. Don’t believe a thing is true just because some famous businessperson says it is true.
That’s the essence of successful solopreneurship. But don’t take my word for it.