Have you been teaching for a few years? Consider applying to become a Master CFI. There are two routes to such certification and both will give you additional credibility in your chosen profession. And both will list you on their website for pilots who are looking for a CFI who is a cut above the rest.
And speaking of websites - Websites and other electronic sites are pretty much a given now. Do you have your own website? Do you at least have a Facebook page? If you have either, are there pictures of your students out there? Nothing like a pic of an excited new solo student to add some zing to your site. And by singing their praise, you give them a reason to share their success with their friends.
And if you have a website or Facebook page, make sure that a link exists on every email you send out. This is simple. If you don’t know how to create a signature for your email on your computer or tablet or phone, ask someone who knows. (and that includes asking me if you wish.)
Where else do you see pilots gather? How about those AOPA safety seminars or other Wings seminars that show up in your neighborhood? Are you attending, or are you just thinking, “I already know about icing.” Or, “I just don’t want to sit through another presentation of runway incursions.” You might not care about the topic, but there are other people there who do. Go chat with them during the breaks.
In fact, I will challenge you to go one step further. Call your local FSDO and ask for the FAA person who is in charge of the Wings program and ask to present a seminar yourself. (I guarantee that you will allowed, no, encouraged, to do so.) Is that too big of a step for you? Ask instead for a list of names of people who are putting on seminars in your area. Or attend some seminars, and find out who the presenters are. In either case, it is not unlikely that the presenter will invite you to help put a presentation together if you ask. (I know that I would love to have some volunteer help for mine.)
Are you interested in flying IFR? How about joining, or establishing, an IMC club in your community. IMC Clubs are a national movement that operate at the local level, bringing pilots together who are interested in flying IFR. (As an aside, a local pilot, who knows that I facilitate an IMC meeting each month, asked me how much it cost to join. I told him that it was free. He asked how I got paid then, and I told him that I don’t. I just do this because I think it is important to do so.)