From fitness to diets to emotional health and longevity, what do people who feel and look healthy do differently to those who are overtired, depressed, or out of shape? Everyday we face an avalanche of studies and statistics that tell us what we should or shouldn't eat, how long we need to exercise for, or how to protect ourselves from second-hand smoke and the harmful rays of the sun. Not only are these studies often contradictory, but the actual scientific information is usually inaccessible. Moving beyond the myths and misinformation, the advice in these pages is nor based on one person's opinions or one expert's study. For the first time the research available on the health of average people has been distilled into one hundred essential ways that we can become healthier and happier. Each of the core findings is accompanied by a real life example showing these results in action.