When we’re young, we all believe we’re going to live forever. But as we age, most of us realize that’s absolutely no truth to the rumors. What’s more, it becomes clear that the choices we construct can have an impact on how long we live. While there are no insures or methods that can tell you how many calendars you’ll buy( despite what actuaries tell ), there are many simple benchmarks that can help predict if you’ll live longer than most. Here are 21 of the biggest reasons why you’ll likely live longer than your peers–try not to rub it in.