I don't think there's any effective way to stop the smokers. Once you started smoking, it's like drugs, you can't quit it. On Korea's cigarette case, there's a small warning sign thus, government has raised the price of cigarette, but smokers are still buying it no matter how much it is. If you succeeded not smoking, you are still likely to hope to smoke again when you see others smoking. There are quite a few people who succeeded and they say they feel better and healthier after they quit smoking and suggest people not to start smoking just with stupid reasons for example- it looks cool and you'll look strong. Therefore, the best way is "Don't even think of smoking".

Good day, Min. That's true! It's just mind over matter. Everywhere you go, you can see people smoking.   So, it depends on the person if he / she will do the same thing.