Standing will be priority one for losing weight easily. Regular exercise will be the primary regimine, but simply standing more and sitting less should help get things moving.
One of the first things I've learned as a lab rat in a weight loss study is that my perception of exercise isn't necessarily related to how many calories I'm burning. Heart rate was a much better indicator during my last exercise session. Sitting down decreases heart rate, which I do a lot since I spend so much time using a computer. Luckily, I have a notebook PC which works great while standing at our bar. The solution is obvious...more time at the bar! I wonder if that's how one of my co-workers avoids gaining weight too. :)
If standing and computing is something easy for you, I'd be curious to know if it makes a difference for you.