I was a real bad chain smoker for many years until one day I felt SOOO bad I said to myself "it just aiin't worth it any more", and cold turkey'ed. It was the day after thanksgiving 1989, and I haven't touched a damn cigarette since. I do miss sharing cigars with folks, including my daughter lol, but cannot touch the nicotine for fear of winding up on the cancer sticks again. And yes, I do have COPD, and it sucks. My own fault.
If you who still smoke can muster the strength and will power, QUIT!! It won't be easy for some, but it beats suffocating to death slowly and painfully from the inability to breath.