If something seems possible, that's probably because someone is already doing it. When something seems that it can't possibly work, nobody tries it. Real innovation happens when someone tries anyway, overlooking an obvious flaw, and finds a way to make an idea work.
Joel SpolskyIf your goals is to produce something of permanent value, you start to think differently about you want on the site.
Joel SpolskyTalk to your customers. Find out what they need. Don't pay any attention to the competition. They're not relevant to you.
Joel Spolsky