I picked a very narrow problem, set myself a tiny budget ($50), forced myself into a tiny schedule (7 days) and am blogging about the process on reddit - http://www.reddit.com/r/EntrepreneurRideAlong/comments/2nbvc...

I suspect that having very tight, formalized and public deadlines will force me to put something out. Even putting out something "not good" would be preferable to me not releasing anything while people are watching.