If you really want to achive to live longer  and to have a better life quality then you should follow these tips:

1. heredity and family history
2. health, i.e. weight, diet, whether or not a person smokes, amount of exercise
3. education level
4. personality
5. lifestyle^[

Obviously some of them cannot be followed like number 1 or number 4 but you can work on the rest and good luck.

Taken out from wikipedia.