Show it off when people say good things about you.
Great word of mouth is often hidden. It's a Zagat rating, it's in those nice emails people send you, it's buried on your web site, it's a hidden review on Yelp.
The challenge is getting the word of mouth out in front of your next customer when they are ready to buy.
It's not hard: Promote your word of mouth. Put it on a sign, on your home page, and in your ads.
Other people's praise is always better than what you say about yourself.