In all honesty, I'm not sure if this is actually possible for some. Of course, taking care to eat right, take safety precautions in living and taking and doing things in moderation is a good way to live, but there are those little genes that might just prevent long life. My Dad lived to 98 years of age....he smoked, drank, had lots of stress in his life, and didn' eat well by today's definition of what's healthy, but his mother as well as his grandmother lived into their very late 90's. My father-in-law exercised, ate well, regularly visited his health care providers, yet he died at 72 from cancer, a disease that plagued his family, and took the lives of his parents as well as many of his siblings.
I'm not advocating throwing all caution to the wind and doing whatever the heck we want....but it must also be recognized that we are the results of DNA soup and sometimes, no matter what....we either live longer or shorter lives. Sometimes our efforts to eat well, drink in moderation, and all the other things we do to stall the Grim Reaper, may keep some of around longer, sometimes, not.
I'll get off my soapbox now and get busy....the more you move, the less likely you will rust.....