Khan Academy is that place on the web. I first saw a story about Khan in a TED video. Khan uses video to explain the world and is how each of us to can learn more.
The site has over 1,600 different videos on a wide variety of topics and all for free. Early on in his career Khan was asked to tutor some relatives in a couple of subjects he was familiar with. After doing this and then being referred to some other relatives, Khan began to feel this was something he was good at doing and something that helped other people.
He makes his money from donations. He is a 501 3(C) organization that is supported by the giving of others. I don't know if this is the best business model but he is without a doubt impacting the world for the better.
Spend a few hours looking over the videos to see what can be done when a person is trying to accomplish and do more that the average person is doing. You never know - you may also learn something at the same time.