wpm

I've typed around 75wpm for the last few years but I've always wondered how people type +100wpm. I've searched but I primarily find typing tutors that teach you to type.. not teach you to type faster. So far the only tip I've come across is to learn dvorak. Are there exercises or tips to help break through the 75wpm wall? Setting yourself up in an ergonomic typing position is a good start. Take a look at the diagram here - notice the arms in a straight line, feet on the floor, etc. In my experience most people tend to slow down when they get to unusual keys - numbers, symbols, punctuation, etc