I quit cold turkey 17 years ago after smoking 1 1/2 packs of menthol a daily for seven years. I just woke up one day during a particularly bad cold, lit a cig..it tasted like shyte, so i put it out and decided that was it for me.
The only lapse I had was one deep sea fishing trip in which I started drinking the moment I stepped foot on the boat 'til we hit shore again some 10 hours later.i musta bummed two packs worth of smokes throughout the day!!
You can do it. Just set your mind to it, and be done with it.