I've lost 20lbs since May with modest portion control, moderate exercise (weight lifting 2-3 times a week, running 1-4 miles 2-3 times a week, and biking 0-2 times a week), and avoiding sugar and carbs from junk food (chips, candy, cookies, white potatoes, excessive pasta, etc).
I've stalled a bit, but I've also been cheating a lot lately (had pecan pie twice this weekend!).
Chris