TSO Photography has posted an amazing time-lapse photography video on Vimeo. His description for the video tells all that he went through in making the video. Quite a fair bit of dedication and perseverance.
My own photos tend not to require as much arduousness (is that a word?). Although, sometimes the heat and humidity in the tropics can make it feel that way. But then you get to hang out in big air-conditioned boxes dedicated to previously unknown (to me) heroes, and everything is happy camper again.