Yelp has been promoting their services heavily on cable lately.
They have cemented their services as the premier review website and Yelp! reviews usually show up higher placed in Google Rankings.
Add your business to https://biz.yelp.com/
If your business is not listed Yelp already it will ask you for your business information.
You will be sent a confirmation e-mail to validate your business information, open your e-mail and follow the link to validate your business.
A Yelp! moderator will validate your business, this may take up to 48 hours.
Once you are confirmed you will be able to point your customers to Yelp! for reviews.