Please stop smoking now. I've seen my wife's dad die of a pulmonary fibrosis at 61 year old and trust me, when you see someone turning blue, gasping for air and then die because your lungs function are at less than 10%. It's not a pretty sight.
You want to quit? Do it like me. Cold Turkey. 72 hours and no more nicotine in your body. Never take another puff.
Bookmark the following link and READ EVERYTHING, I MEAN EVERYTHING. Educate yourself first, then prepare how to quit. :
http://whyquit.com