The "new" Atkins diet has folks eating more proteins and less carbohydrates. Works better than a low/no fat diet for the first six months, then progress flatlines and actually reverses.
Low fat diet, and regular (thirty minutes every other day, swimming is the best) exercise is still the best long-term solution, ASSUMING you have the willpower to change your eating and sedentary habits to begin with. My (personal and not professional) advice is, if you can't live without fat, at least eat smaller portions. Drink water before and during meals if you feel empty--increasing water intake not only "fills" the stomach but actually reduces the amount of energy the body pulls from the food. Consequently, one will see an intake in waste production from such circumstances <img src="/images/graemlins/smile.gif" alt="" />

I must add, however, in a survival situation, DO NOT EAT FOOD, if you don't have a ready, available source of water. Eating food with no water will pull water out of your body to digest the food...bad scene in a desert <img src="/images/graemlins/frown.gif" alt="" />