thinking is one, execution is another. Reading is important, but action is crucial. I have no problems saying that I can think like entrepreneurs, and I believe you can as well, what separates winners from the rest of us is relentless execution. I used to force myself to think of 5 new startup ideas a day, at the end of the week I have to pick one idea to execute because we don't have enough time and money, what I want to say is idea is easy to come up with when it becomes your habit and once your team found a process to brainstorm, but execution really matters, we're still building our 1st startup around 1 single idea among bunch of our ideas from the portfolio. (and the idea has changed dramatically) .
The "business" books RWR advised against are fluffy, not-business-at-all books like Gladwell -- and Seth Godin's, which are partially fluff, and partially excellent sources of case studies.
The guy quoted in RWR slammed case study books because they are soft-touch "how to build great companies" - but that's only SOME of them. The - you guessed it - fluffy ones.
"Don't read books that are nothing but fluff" is just not a battle cry people click on, so instead they say "don't read business books!"
Read Positioning, Spin Marketing, Pricing with Confidence, Getting to Yes, Rules for Revolutionaries, Purple Cow, etc., etc.
If you read, say, Purple Cow, or Positioning, or Pricing with Confidence, and don't come away with actionable ideas, you either have an empty head or were just running your eyes over the words and not thinking.
And read lots of biographies. They're practical storytelling - learn from me, kid - pinned down on paper.