I already have a standing desk. But I still find myself tied to the desk for hours. My one thing is to set a timer and walk around the my work complex every hour.

I will take the clean laundry off the ping pong table and start playing again. On the days when no one is around to play, I'll go for a walk in my neighborhood.

I teach, so on my plan I'm going to leave my classroom and walk around the school at least once. I will try to work up to more times.

I hope it's okay to add on to something I'm already doing, since I have been trying to get more active. In March I joined the MFP group Leslie Sansone Walk at Home, and I started with 1 mile at a time, and got up to 2 miles 6 days a week, 2 weeks ago. (Yesterday I managed 3 miles.) My goal for May was 40 miles, because I wanted to add in other forms of exercising.

I am thinking of somehow adding in a 3rd mile, doing spurts or short walks throughout the day, in addition to the 2 miles. It can be another Leslie routine, a walk outside, or laps down in the underground parking garage between laundry loads. (I live in an apt building.) The 2 miles is before supper, so this other will be earlier in the day.
I have pedometer/ watch, which, if accurate, I need more strides to make a mile than most people. I tend to wear it only for exercising, but I am going to work on wearing it all day, and attaining 5000 steps daily this week, increasing that a bit each week.

I will do gardening on sunny days and de-cluttering on rainy days, for a minimum of 1 hour every day.

My one thing will be taking a walk if I have a afternoon slump instead of a nap. Or before a nap if I really need the sleep.

The Fitbit dashboard now has the hourly active minutes. I set mine from 6am to 8pm and I am going to get at least 250 steps in each of those hours. Doesn't sound like much but for someone tied to a desk 7.5 hours a day, it takes both awareness and commitment.