DO NOT reduce daily calorie intake below 1200!
Your body panics as though you were starving and automatically cuts down your metabolism.
Keep average daily calories above 1200 and exercise.
Here's a tip: There is a metabolism bonus to 20-30 minutes of aerobic exercise. After an aerobic performance, your body metabolism is increased for up to six hours. So as you're getting more fit, try getting an aerobic hit twice a day . . . once in the morning and again in the afternoon.