I had smoked for almost 20 years when I decided to quit. I used the patch. Be sure to follow the directions. Start with the right amount of nicotine based on your daily habit. Taper down as directed. Done properly, it will kick you of the habit.

The other thing to keep in mind are the non-addiction contributors to the habit. Identify and eliminate social triggers. If there are situations where you typically smoke, avoid them for at least 3 months. If there are friends who smoke with whom you usually hang out, avoid them for at least 3 months. That 3 month thing is pretty naturally ingrained in us. Making a habit or breaking a habit generally takes 3 months.