While some people have been able to quit smoking on their first attempt, this is very rare. The line, "And one day I just quit smoking." is either not telling the full story or it happens very rarely.
I smoked for 12 years. It took me somewhere between 30 and 50 attempts to quit smoking. (You really loose count after that many times.) I consider those sincere attempts. Some lasted a few hours, other days, others weeks, some lasted months and I even quit smoking once for 1 year and 2 months before returning to smoking.
I have quit smoking now and I am coming up on 9 years cigaratte free. Most of the people I have talked to that have quit have also taken many, many attempts to quit smoking.
Don't think you are going to quit the first time. You may, and if you do, congratulations , but it is not the norm. Be patient with yourself. Quitting smoking is usually a process of many failed attempts where you learn a bit each time - hopefully that knowledge and failure will one day allow you to succeed in quitting smoking.
