Solicit reviews from happy customers
Rarely is there much you can do about a bad review. You can, however, stack the deck in your favor by asking for reviews from satisfied customers. Their reviews are worth more than all the hand-picked customer testimonials in the world.
4.5 Stars beats 5 out of 5
If it looks too good to be true, it probably is. The same goes for reviews. The reviews don't have to be over-the-top. No one would take them seriously. During solicitation, ask for honesty.
Look at locals
When prospects are looking for businesses of your description in a given area, most online local listings come with reviews. There's no better time to show off your rating than when the prospect has already found your business in their desired area.
Some of JDM's favorite locals and listing sites:
Look into putting online reviews into your marketing mix. They're not just for B2C anymore.