Could you tell me what are effective ways to get someone to stop smoking cigarettes?

Not Much: Smokers know the risks & what it does to them & will quite only if they want to. Trying to convince someone to quite will usually cause more porblems between you & them. You can make it clear you don't want them smoking around you, in your home or car & you can encourage them gently that you are concerned for their health, but anthing further becomes nagging & could lose you a friend.

Quitting smoking.: Cold turkey is the best way, but nicotine or cigarette tapering are viable options as well. For cold turkey, pick a quit day in advance, prepare for it, and go for it. http://www.amazon.com/Thats-Quit-Quitting-Smoking-Forever/dp/0595290469/ref=sr_1_1?ie=UTF8&qid=1416278193&sr=8-1&keywords=giannone+i+quit