Once you have that problem or need nailed, the next step is to validate that idea and make sure you’ve actually got customers who will pay for it. This means building a minimum viable product, getting objective feedback from real customers, incorporating updates, testing the market for demand, and getting pricing feedback to ensure there’s enough of a margin between your costs and what consumers are willing to pay.
Just wondering how many people you know personally, that saved and invested, especially if they made minimum wage, weren’t college educated, had a family to support, etc. and became as you say, ‘filthy rich’ by following the principles of this page? People read simple-minded articles and poor things, if they are simple-minded enough to believe the garbage.