People get excited when you shine the spotlight on them.

Take a baseball game for example.  When someone in the crowd shows up on the Jumbotron and realizes they're up there, they grab the person next to them and frantically point towards the big screen.  They start jumping up and down, ecstatic they're in the spotlight.  They're going to go home and tell their friends and family that they made in on the Jumbotron.

You can apply this simple idea to your business.  Shine the spotlight on your customers.  It doesn't have to be a big spotlight.  Just big enough to make the customer feel special.

With their permission, highlight their experience on your blog.
Send them a thank you card with a coupon for next time.
Give them a membership card for free.

Are you shining the spotlight on your customers?