I have my whole office set-up at waist level; I don't sit at all during the day. Sitting, to me, is the devil.
I've begun to think that we sit far more than we're supposed to...Why else would we have feet?
I try to get seven hours of sleep every night; I always walk or bike to work; I make a point to eat well and take my vitamins; I drink tons of water; and I always spend a portion of my day at a standing desk.
I have a desk that I can raise or lower according to the state of my aching back. Sometimes I stand at it, and sometimes I have it high up to write at and sometimes a bit lower to type.
I stand for 8-10 hours a day. Why is standing limited to four hours?
Don't stay in one place for eight or nine hours.
Most of the day I work standing up, as I once read somewhere that it's the best position for the back.
The biggest problem with working at a treadmill desk: the compulsion to announce constantly that you are working at a treadmill desk.
I write at a standing desk, which has helped me be much more productive and solved some back problems, but mostly all my quirky habits have to do with procrastination and avoidance rather than with work. I'm slowly trying to stamp those out.