Framing the question for the day

Well, it's early in the morning but I'm late getting started and have to dash out (day job, you know, and a demanding couple of weeks beginning) but I wanted to at least start this before the thought evaporates in the face of endless details and busywork. Maybe by the time I get back to pondering this question, I'll have some comments to add to the soup.

What is it that makes someone really good at what they do? And I mean good in a broad sense, not just famous or reknown or rich from whatever their endeavor is.

I'll revisit this later. Hope everyone has a great day!