Is it too late or...?

My grandfather smoked an ounce of Best nut brown a day and spent every night of hes long adult life pissed. He loved a fry up every sunday and ate pies sausages fish and chips etc.....He never exercised AT ALL.......and lived to be 84. My other grandfather never smoked, didn't touch the booze at all and lived quite a healthy life style. He didn't make it to 65. Its a lottery mate. Just enjoy your life and do what ever makes you happy.