What to do when you have insomnia ?

It's not a cure, but it's better than trying to sleep. The answer is "check out the web cams on the other side of the planet". Even if everyone in your world is out like a light, and the streets are empty and silent, you can watch dawn in Amsterdam, or noon in Nairobi, etc. Or, just watch the streets in your own city from the safety of your PC.

Check out Earth Cam - http://www.earthcam.com/