Probably there isn't a real method of how, except for repeatedly trying things out until you hit something, a thing which is actually described in the talk. He

Probably there isn't a real method of how, except for repeatedly trying things out until you hit something, a thing which is actually described in the talk. He says that reaching PMF once only lightly helps you reaching it again, and he thinks that the real help you gain from it is how to identify it once you have it.