Also we should bear in mind that the body can exist well in a lean state. Try to eat less throughout the day. Your body will become accustomed to eating less and the transition when the SHTF will be a lot less bumpy. As extreme as this may sound, I trained my body to consume only 500 calories a day of very lean foods. I know it sounds suicidal, but the truth is in my lighter state I had much more energy and even slept more deeply at night. Remember that after 30 days, anything can become a habit.