My mother quit too only after she lost a lung. She died at the age of 59 from smoking related cancer.
I am not saying that I never smoked. I did try it and after a while I noticed that I did not enjoy it. So I smoked less and less. The thing that helped me was that I never learned to inhale. One time though I tried to and after I took the first inhale it went like cough, cough. I took the cigarette out of my mouth saying to my self 'I don't need this'. I tore the cigarette up and threw the the pack away and that was in the mid seventies when we were stationed at Fort Riley, KS