No satisfactory way exists to explain how to form a good idea. You think about a problem until you're tired, forget it, maybe sleep on it, and then flash! When you aren't thinking about it, suddenly the answer arrives as a gift from the gods. Of course, all ideas don't occur like that but so many do, particularly the most important ones. They burst into the mind, glowing with the heat of creation. How they do it is a mystery, but they must come from somewhere. Let's assume they come from the "unconscious". This is reasonable, for psychologists use this term to describe mental processes, which are unknown to the individual.