Taking better care of your health is essential to your happiness. If you've been moody, it may be because you haven't been giving your body the proper nutrients. Avoiding fat, sugar and alcohol can restore your equilibrium. Minor irritants won't drive you over the edge when your diet is mainly comprised of lean protein, fresh produce and whole grains. It will also help to take some brisk exercise each day. Never underestimate the strength of your mind/body connection; it is incredibly strong.