Marketing successfully and time effeciently

To those Experienced Notaries:
I’m in this for ~ 18 months now. The end of 2019 was good for me in that I picked up business and was doing 3-8 signings a week. I want more.
How do you market yourselves? I’d like to make use of the title and lenders that were the receivers of the loan packages I sent back, since they’ve been exposed to my work. Most of my jobs were from companies like Timios, Bancserv, Solidifi.
I want to make as many people in this industry, across the county, AWARE that I am here to help as possible. At the same time, I don’t want to over reach and cross the boundary with the platforms/companies that gave me those assignments.
I don’t want to waste time sending out emails that may not be read, not that I’m not willing to do it. I just don’t want to waste my time, if some other way would be more productive.
Any ideas? What’s worked for you?