Stop Smoking?

I recently fell off the wagon. I have smoked for 20 years, quit countless times for a week, month, even 6 months couple time, but I always seem to falter when the stress builds up. 3 weeks ago I hit that stress wall and with no other way to manage the stress I started smoking again...... I really need to find a career that I'm passionate about, then maybe the little things would not get to me.