Keeping the pen out of your hand as much as possible is the best way to write a song, in my estimation. But the pen must come in to tighten it up.
People assume that science is a very cold sort of profession, whereas writing novels is a warm and fuzzy intuitive thing. But in fact, they are not at all different.
The two important things I did learn were that you are as powerful and strong as you allow yourself to be, and that the most difficult part of any endeavor is taking the first step, making the first decision.