Even if you follow all the best health habits to the letter--and let's face it, who does?-- you can't control every variable. Genetics (family health history) plays a huge part in our fate, and those factors are totally out of our control.
Therefore, be sure to get regular checkups and all recommended screening tests for your age and gender. Pay attention to your body and don't ignore physical or emotional symptoms that you know aren't right.
I have personal experience to attest that even healthy foodies can have life-threatening health challenges well before old age. My father, grandfather and brother all have or had coronary artery disease -- a bad heart. Those same genes reared their head, so to speak, on my own heart a few years ago and I've had to deal with it ever since.
Suffice it to say that we should never take our good health for granted.