According to W.A. Pannapacker
Academe is full of potential geniuses who have never done a single thing they wanted to do because there were too many things that needed to be done first: the research projects, conference papers, books and articles — not one of them freely chosen: merely means to some practical end, a career rather than a calling. And so we complete research projects that no longer interest us and write books that no one will read; or we teach with indifference, dutifully boring our students, marking our time until retirement, and slowly forgetting why we entered the profession: because something excited us so much that we subordinated every other obligation to follow it. If there is one conclusion to be drawn from the life of Leonardo, it is that procrastination reveals the things at which we are most gifted — the things we truly want to do. Procrastination is a calling away from something that we do against our desires toward something that we do for pleasure, in that joyful state of self-forgetful inspiration that we call genius.
See also “You don’t even know what you’re procrastinating on” and other blog entries about Effectiveness.