A cigarette always helped with my stress, what do I do now that I've stopped smoking?

From my book, "How to Win at Quitting Smoking":



Stress is a major cause of
relapse because smokers lack other stress reducing options. Smoking has been an
easy low-effort coping behavior that you have used to deal with situational
stress and strong emotions. Smoking provides temporary relief from the physical
stress of nicotine withdrawal, which is the reason why smokers mistakenly
believe