I tried quitting for years man and always failed. I've always been a person to get 3-4 weeks in without having a smoke and end up buying a pack because I couldn't take the withdrawals. For me personally what made me quit was a health scare with me, I came down with a chronic illness and smoking would've exacerbate and made it worse so for the sake of my family, my child and my girlfriend I just threw my pack away and never touched them again, it's been like 9 months since I've had a smoke.
I never believed in chewing gum or putting patches on my arm, just always tried the cold turkey method and found that every time I did I was able to reach another week or two before relapsing, but the last time with my health issues was what pushed me over the edge.