Keep the metabolism up!

Burn The Fat: "Lose body fat without wrecking your metabolism. If you've ever started a diet, then smashed into the dreaded 'plateau,' it's probably because you cannibalized your own muscle and slowed down your metabolism. Not only will this system teach you the only way to prevent your metabolism from crashing, you will also learn more than a dozen ways to fire up your 'metabolic engine' and accelerate your body's natural rate of calorie-burning."