Weight loss will hit a wall after a while. That's just the way it is. In order to stay on track, try tricking your metabolism after a few weeks on a diet. Eat around 200 to 400 extra calories a day for 3 to 4 days, and then remove 400 to 600 calories from your diet. Your system will reboot, so to speak, and you'll pick up where you left off with burning that fat.
To help your body process fats more efficiently, eat foods that contain niacin-B3. B3 is essential for metabolizing fats, and blocks of fats in the body cannot be synthesized if you have a B3 deficiency. Foods high in niacin-B3 include chicken breast, salmon, and shiitake mushrooms. Other sources of niacin-B3 are peanuts and sun dried tomatoes.