in reply to Since I began using computers, I have hurt my:
Most of the answers fit, but I had to choose sleeping cycle - although I'm glad the days in which my live gave nothing to me to make avoiding a three-whole-days shift worthwhile are gone. And I'm sure I couldn't do it anymore if I wanted to...
Programming in sleep-deprivation induced trance is an interesting experience, though.
Now my children hurt my sleeping cycle, but that's a different story...
An intellectual is someone whose mind watches itself.
-- Albert Camus