Nothing helps but determination. Some kind of motivation is needed. This is my Personal experience and opinion. I was smoker and tobacco user for almost 14 years. When my son was 2 years old I thought that I should be quit for him. It happened just like that I quit I threw the packet that I have, vow to myself and quit. After that I smoked one or two here & there. Completely been non smoker for two and half years now. My suggtestion throw the one you have never buy another pack refuse if someone offers you. Do not go near if someone is smoking for time being  till you lose the urge to smoke mentally. But you have to quit physically. 

न पेट भर्ने न झ्याप हुने बेकार  पैसाको सत्यानाश 

I hope it helps