As you may not know, every pound of bodyweight contains 3500 calories. So if you want to lose a pound a week, you'd only have to consume 500 calories less than you expend every day (7 x 500 = 3500).
This is done by controlling your calorie intake and burning calories through exercise, day-to-day activity, and by raising your resting metabolic rate (RMR) through added muscle, frequent meals, and the post-workout rise in RMR.