I used the method of Dr. John Sarno to rid myself of chronic wrist pain/RSI.
I say "rid" instead of "cure" because Sarno's method claims that such pain is entirely psychogenic, and is thus addressed by psychological means rather than pills, surgery, or other physical interventions. The theory is that the pain is generated by the subconscious as a way of distracting the conscious mind from unpleasant thoughts/emotions. By recognizing this process and forcing yourself to deal with the unpleasantness, the subconscious gives up this "strategy" and the pain disappears.
The really interesting thing about this theory is that it predicts "the symptom imperative," which in practice means that soon after you begin challenging your primary symptom, your subconscious may shift to a new symptom. New symptoms understandably cause the conscious mind to become afraid, and thus distracted again.
That part is what really sold me on the theory. I was skeptical at first, but sure enough, as soon as I began attacking my wrist pain, I began having headaches and other inexplicable symptoms, each of which resolved quickly. The nice thing is that the method is more effective the more you believe in its efficacy, and so a virtuous cycle can develop.
My wrist pain was never severe, but it was bad enough to scare me away from typing with my right hand for the better part of a year. I also had a lot of numbness and tingling, and occasional acute pain in my middle (scrolling) finger joint. I attributed these symptoms to overuse, and in addition to not typing with that hand, I used wrist braces, elbow braces, ice packs, a new keyboard, etc. These tended to help for a few minutes to days before the symptoms returned.
Once I had been typing exclusively with my left hand for a while, I began experiencing symptoms in that hand as well. The prospect of not typing at all was very scary (which is exactly what my subconscious wanted). I finally went to a specialist, who performed a nerve conduction study and told me there was nothing physically wrong with me. If I had not know about Sarno's theory, this information would have been rather distressing. Instead, it came as a relief. I could now pursue Sarno's method without reservations. And within a week, my pain was 90% gone. After pushing through the symptom shifting, my pain was 99% gone within a month. Nowadays I have no wrist pain at all, and I can type as long as I want without regard for ergonomics. I consider myself very lucky and have since become something of a PPD/TMS maximalist. If you have chronic pain or another chronic condition, I urge you to read one of Sarno's books and evaluate the theory for yourself. Scientifically, I think it has more of a leg stand on than homeopathy, crystal healing, etc., but at the end of the day, all I can say is that it worked for me, and I hope it works for you too.