verisimilidude touched on a couple of these points already but apart from training your mind to not worry about pain you can also train it to type in Dvorak. I went even a little further and bought a $30 datahand keyboard (a really, really good price) but even with that dvorak'd wacky thing it only took me about 3 weeks of typing to get proficient and pain free. A good chair goes a long way as well.