I have started a new routine at work, if your work has stairs try this it's great. Every time I get up to get water or go to the bathroom i trot down 4 or 5 flights of stairs and walk back up. I try to do this at least 10 times a day. After the first week i can already tell a difference and combine this with my 4 miles of walking a night and i get plenty of good exercise. Hey why not work out at work kill two birds with one stone.