Mr. Wrigley believed in this: Put all your eggs in one basket and watch the basket. They don't do that today. This is the old-fashioned way I'm talking about. He carried it on to his business. Do one thing and stay with it.
The Final Jeopardy! questions seem to be, by design, things you can't know. And so it's not about who knows them, but who can figure them out in thirty seconds.