It's best to provide your body's metabolic factory with fuel when it needs it — during the daytime while you're active; not at night when the excess fuel will spill over to your hips, thighs, buttocks and arteries as fat!
(If your work schedule is such that you work nights and sleep during the day, adjust accordingly.)
Increase whole grains and fiber. Not only do these provide cancer-fighting nutrients, they help you feel satisfied sooner, thereby limiting overeating. Whole grains and fiber will keep food moving through your digestive tract.
Nutritional supplements. Many clinical studies have shown that a variety of dietary supplements can help promote weight loss by boosting metabolism and burning fat. Some work, and others are hype. Consult a physician/nutritionist to determine what is best for you.