I gave up about 28 years ago. It took several attempts, I lasted 3 months first time, nearly six months then 18 months. During each period I craved a ciggy, especially after a meal or in the pub. Of course, many people smoked then, most of my friends and workmates smoked so the temptation was severe.
In the end I decided to do something drastic, I rationalised how many cigarettes I actually enjoyed throughout the day, it came down to 2 or three, mostly after meals. The rest of the time it was pure habit and addiction and I was smoking up to 30 or 40 a day at the highest point. This got me into the mindset of thinking I was spending a lot of money I couldn't afford for very little return. I then went out and bought a 200 pack of Dunhills and forced myself to smoke them in 3 - 4 days. My last recollection of smoking is feeling pretty sick, I think this gave me a subconscious edge. The result was that on the final try I didn't crave cigarretes at all after the initial couple of weeks so it was relatively easy. Today I can be in company who are smoking without any pangs or cravings.
My solution was pretty fowl but it worked for me. I think if you get your mind in the right place it is likely to be more permanent and easier to do. Good luck, it certainly ain't easy.
tomorrow will be a week for me.