I've found that people often underestimate the power of a simple request. As a customer, if a small business I work with *asks* me to write a review, I feel compelled (in a good way) to do it, and more times than not I have happily written a review for them before the day is out. If they don't ask, more often than not it simply doesn't occur to me to write the reco. People love to write reviews and help out, but it's the suggestion that often seals the deal.