Why not go where your clients are? Participate in their professional organizations so that you can make them aware of your services. Don’t sell to them, but offer your expert advice when it’s asked for, volunteer your expertise in posts for their blog…
Consider your niches, your beat, your clients, today, in my Canadian, Eh? column at Copyediting.com.
Photo by Kosky Koshy used under CC BY-2.0 license.