Personally, over time, I've found that being an example is the foundation for persuading others to quit. People that I know who smoke eventually find out that I quit many years ago, and they see that I'm visibly comfortable with it, and happy I did. Eventually, one of them will ask me how I did it, or mention that they're trying to quit. At that point, I point them here, tell them how the education here has helped not only me but so many other friends and acquaintances, and answer any questions they have.
Be an example. People will seek you out.
imageBob (6+ years free)