You’d be wise to focus on better ministry. Check out the graph below that John Moore of Brand Autopsy pulled from the January 1, 2007 edition of Ad Age:
John makes a valid point: "Starbucks spends its advertising dollars on making better products and better customer experiences and not on making funnier television commercials."
Same principle applies in ministry. People will be more likely to show up on Sunday morning because a friend invited them than if they receive a postcard in the mail. Not saying postcards don’t have their place. I’m just saying the most effective "marketing vehicle" is word-of-mouth.
So, it begs the question what needs to happen at the church so that people are more likely to invite their friends? That’s a question worth wrestling with.