Business attire, on treadmills. Might have to get one for myself.

I know a few who do this. My wife usually schedules a walk in her calendar too - even if it is only for ten minutes. Unless it is scheduled, it doesn't happen though.

Tai Chi is great exercise from what I understand. It is more like a controlled resistance perhaps - very deliberate. Very intentional.

Cleaning the house is a good too. I have also thought about getting one of those weighted vests to make it harder - though our vacuum cleaner is a heavy beast.