When I was wide-eyed, I built a lot of webapps that never saw the light of day -- various forms of social networks for niche groups. They were poorly written (

When I was wide-eyed, I built a lot of webapps that never saw the light of day -- various forms of social networks for niche groups. They were poorly written (saw some source code a few months and I nearly cringed) and I failed to do any market research before I started them -- but they actually taught me a lot.