As a computer tech guy i developt recently what is called the carpel syndrome that causes pain in my wrists. I found this handy tool called workrave. it has a timer for breaks and for coffee breaks. what it does it counts backwards a predefined time span. when the time ends it disables the use of your pc forcing you to take a break.

for example while i was writing this article i had a micro break of 20 seconds for relaxing my wrists. thats pretty handy i must say.

http://workrave.org/  download the software here

More about repetitive syndromes here at wikipedia 

   

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