I've tried lots of things but haven't finished any.
conquest: I sometimes feel the way you do.  I started a local ratings company and then google and yahoo ratings took off.  Interestingly enough it never really caught on and yelp perhaps has done a much better job.  I've tried babysitting coops, and several other ideas all which failed. However the more I read, the more you discover that the key to success is working hard and trying lots of ideas and constantly refining those ideas quickly. I take myself too seriously at times and I really need to start having more fun with my side projects. Your broad range of ideas and knowledge is the important thing here, it will greatly benefit you in the long run.