I have this t-shirt. It reads: "Knowledge is power. Power corrupts. Study Hard. Be Evil." Because if we take those two first popular truisms and put them together, we get a very unpopular conclusion.
The truisms of our business are "It's an attention economy, where revenue is driven by how much attention you can get," and "In order to succeed, a website must have multiple streams of income."
Therefore, "In order for your website to succeed, it must have multiple ways of getting attention."
And that's the tricky part. In the real world, that still takes patience, legwork, and dedication.