I'm a consultant working from home right now, so my life is really sedentary! I know how hard it can be to get movement in the day. I exercise (45 minute run, lift, yoga) 4-5 x a week. But that's not enough to offset sitting all day, I know- I was the one who started this thread!:
http://www.3fatchicks.com/forum/weig...g-all-day.html
I'm a big-time multitasker so I try to get in activity (even just standing) while doing other things- picking up groceries, doing housework, etc. I try to walk around our apartment complex in the morning for about 20 minutes while I listen to news podcasts. During the day I make sure to get up out of my chair at least once an hour. I do a little bit of straightening up the house, do laundry standing up while watching the Daily Show (haha), walk 10 minutes to the nearby vegetable market, etc. I also stand for about an hour in the evenings/late afternoons to cook dinner.
I'm pretty convinced that sitting down all day is killing us and that every little bit of standing, walking around the apartment, etc is just as important as structured exercise.