6) Do not decrease your caloric intake far

below what is required of your BMR, or you risk forcing your body into starvation mode. "Do not under-eat by too much. If you consistently eat way too little, your body will start to think it's in a starvation state and for the initial period, weight loss and fat loss may become harder than anticipated. After a while of severe underfeeding, instead of preferentially burning fat for energy, your hard-earned muscle will be burned for energy" (source: Fitness Rx; February 2004; page 93). So if healthy weight loss is your goal, and you only want to burn fat while you preserve your valuable muscle, then take great care to not starve yourself.