For the last year I have been running writing workshops (through a writing organisation) to earn some "writing dollars". I've had great feedback and recently I've had a local bookstore approach me about running writing workshops at their store. I'm not sure how many dollars this would generate (probably not many), but I know if I was published this would be a great opportunity for marketing, if nothing else. I'm sure there is still something I could do to make the most of this opportunity (money aside) and wondered what sharkly advice you could offer?
I'm not sure you want to think of the writing workshop students as a target audience. Nothing makes writers crazier than being pitched books by someone they're paying for something else.
And if you really want to see writers froth at the font, ask them how they feel about agents pitching "how to query" books at the bottom of a rejection letter.
As for making the most of this opportunity, you can't plan for it. Seize opportunity when it knocks, don't go chasing it down the street, tackling it at the intersection and handcuffing it to your pogo stick. Opportunity gets quite fretful when abused like that.
Keep your eyes and ears open, and when someone offers up a crackpot idea, think about it before saying no. Some of my best ideas started out as harebrained schemes.