I stubbled on 10 Benefits of Rising Early, and How to Do It, and I have to admit it is good stuff. Until my kids were born, I was never much of an early riser, but since then I find that I can't sleep late anymore. When I do, I feel like I missed something. There is nothing like greeting the day when the sun is just coming up. It's worth not staying up late. BTW, the rest of the site has some very interesting tips as well.