21 Damn Early Days
This whole 21 Damn Early Days thing is about a hell of a lot more than just waking up early. It's about getting up and getting after life. Your life.
And while most of us have to live within some of the constraints of reality (ie. money), it's never a bad thing to understand how you'd spend your time if those constraints weren't there. Knowing what pulls at you, moves you, and how you'd spend your time if you could spend it ANY way you wanted can be a powerful tool in designing a life you want to live.
Few, if any, explain this better than Alan Watts. Take a few minutes and watch the video below. It will definitely get you thinking about a lot.