Well, I do my newsletter monthly and it includes usually four blogs posts from my site, then I'll have some other info. Last month was the first time I've tried this, and I inserted a small article about something relevant to lettings agents. For February I'll try and write something relevant for surveyors etc.
This was
last month's newsletter.
Will let you know after a few months if it's had any impact!
You could also ask other people to contribute: I ask people to write guest blogs which then feature in my newsletter - they get a brief bio and backlink on my site in return, and sometimes we exchange blogs (so I'll write for their blog with a bio and backlink).
I'm not sure what you focus on, but say you do typing and word processing, you could approach a VA that specialises in bookkeeping to write for your audience.
HTH