There’s a brief comment on his FAQ page which jumped out at me: “[...] I also try to watch very little television”. Bingo. Life’s too short to watch television. This guy shows just how much people can accomplish when they put their mind to it.
When asked about his religion, Salman Khan replied with this...
If you believe in trying to make the best of the finite number of years we have on this planet (while not making it any worse for anyone else), think that pride and self-righteousness are the cause of most conflict and negativity, and are humbled by the vastness and mystery of the Universe, then I'm the same religion as you.