Some random ideas to make the world better:
1. human powered alarm clock. User posts requests for wake up calls, and people around the world call them until the request is met. The phone #s are kept private of course.
2. Intelligent systems that learns diversity. For example, if I google some thing and don’t find the right hits, as I keep on searching, the engine should learn that whatever it presented before are not useful! Use that information to adaptively improve search instead of giving the same stuff over and over again.
3. Incentivize people to be “visible”. For example on skype, it’s easy to set the status to “invisible” so that you can snipe whoever you want to talk to but not be bothered by other people. If many people do that then it’s difficult to find people when you need to find them. Somehow pay for people to be visible.