What you should worry about

You''ve heard this question a lot. It's what a novice asks an expert. He's planning something or launching something and he wonders, "Should I worry about..."

Actually, it doesn't pay to worry about anything.

It might benefit you to pay attention to something or to learn about something, because that will help you make a better decision when then time comes.

If it's not something you can decide about, if it's not something you can avoid, then all you can do is worry. And what's the point of that?