I'm running out of excuses myself.

The people who successfully start independent businesses [...] do it because we have no real choice in the matter. The voice in our heads won't shut up until we discover if we're right, if we can do it, if we can make something happen. This is an art, our art, and to leave it bottled up is a crime.

http://sethgodin.typepad.com/seths_blog/2010/11/how-can-you-do-it.html