I could use some advice on quitting

From being in and out of mental institutions to living in recovery centers I use to self harm on a daily basis then I had a spinal surgery rods and screws and 4 broken ribs got hooked on morphine and hydrocodone for awhile and then started smoking heavy. I'm a year sober right now I had the willpower to pull myself back up and I don't want to touch drugs again my past is a blur as well. The one thing I'm struggling to kick is smoking cigarettes. I'm smoking around 2 packs a day and I realize what I'm doing to my body but I can't manage my stress whenever I'm feeling anxious or upset I turn to smoking, I don't know what steps to take to cut back and quit? Does anyone here have any advice on how to cut back and quit?