I think, unless something horrid is planning to take you out the secret of a long life is our own attitude.
My granny went into her 90's with a great attitude and a serious case of hypochondria so she perhaps isn't a great example but we used to say she would outlive us all as she was actually fighting fit right to the end.
I plan to keep going as long as I can and see no reason why I shouldn't. The online calculators say I'll live to 86 so if I managed to finally quit smoking I could last a bit longer!
Accept death? yes, accept it will happen but don't dwell on it, when my times comes, either physically or mentally I hope I'm ready.
All the people who last longer do seem to have lived simpler lives involving easy attitudes and no serious over indulgence. Something to ponder I think but not get too worked out about. When our time comes, it comes...I just don't want mine to come until I've at least doubled my current age!