I guess lots of people have the same problem I had, which is that, due to the extensive use of computers, I had always pain in my hands. Not enough to think that I had RSI, but I had been feeling that for so long, that I guess I would get RSI sooner or later. So, since Davyd just mentioned it on IRC, here’s a tip on how us (hackers) can prevent any injury. I was advised to use the Chinese health balls while watching TV or just sitting on the couch, to massage the muscles in the hands, and after almost 2 months using them, I have to say I don’t feel pain anymore, and when I’ve felt some (just in the first few days), using the balls for a little bit calmed it down.
So, if you use computers too many hours and feel some pain in your hands, I advise you to try, it has worked for me.