A recent article in the Wall Street Journal finds there are various pockets around the world with a remarkable number of healthy nonagenarians or centenarians. The study of those populations determined there are ways to strive towards longevity. You need a diet high in vegetables, fruits, whole grains, beans and other carbohydrates, paired with lots of bursts of daily walks, activities, and exercise.
What does not work? Lots of regular animal protein: see the Wall Street Journal, May 30, 2015 article “Want Great Longevity and Health? It Takes a Village” An article about the lifestyles of centenarians in Sardinia, Italy.