Keep up the good work! Clean lungs! White teeth! No yellow stains in your fingernails, No more looking for a place to put the nasty butts! Spending your saved pennies on good wine instead!
I quit eleven years ago by using Zyban. It's sold in Thailand under the name of Quomem. It's also an antidepressant which one must use for several weeks for it to work.
At first I felt out-of-sorts from the medication and continued to smoke. After a couple of weeks, the compulsion to light up went away. Over the next several weeks when I went out with my smoking and drinking friends, it felt strange not to be smoking. I would hold an unlit cigarette in my hand the entire evening. Then one day, I just forgot all about smoking.