Books that deal with questions like this.

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You're 14, back in school, PE. It's the 50 meter sprint. You're on your mark.
>Get set.
And suddenly a thought pops into your mind. Why run at all?
>Go.
You hesitate, only for a moment. Half a second passes. The kid on the right is too fast, now you can't win anymore. 3rd or 2nd is still possible, but is there any point in running if you can't win?

But you are still standing, you thought too long. 2nd place seems impossible now. Sure you can overrun the fat kid on the left but what would you proof with that? Trying to start seems pathetic now, that's just setting up to fail.

What do you do? Stand or run?