I'm very surprised that no one is standing up while working. I tried a couple times in the past, but never stuck with it. Prompted by an article I read this morning, I tried again this afternoon: http://bit.ly/dyBXft (my live reactions on Twitter).

It is a bit tiring, but it has an amazing way of focusing your mind.

Anyone here has done this on an extended period of time? How was your workspace structured?