Living past 100 isn’t all up to your genes. There are a lot of lifestyle steps you can take to live a long and healthy life. Researchers have found that abstaining from smoking, getting a minimum of 3 ½ hours of physical activity each week, eating a nutritious diet, and maintaining a BMI of less than 30 can make you 80 percent less likely to develop a chronic disease. Additionally, studies on people in their 80s and 90s with high brain function have found that getting sufficient sleep and releasing stress are key components to the longevity equation. Finally, maintaining a social circle has been shown to support health and ward off mortality as well.