First Principle as a thinking tool
How did Elon Musk do it? How did he achieve success at whatever wild dreams he had? The way he thinks can give you a hint of his success - and he is an proponent of an 'old way' of thinking taught by Aristotle.
"A first principle is a basic, foundational, self-evident proposition or assumption that cannot be deduced from any other proposition or assumption." (from Wikipedia). Sounds complex? It simply means keep asking "Why" when you face a problem until you can no longer find more answers.