Every time a customer completes a transaction, grab a stack of your business cards and write the customer's name on it, along with the date. When one of their friends comes in and brings that business card, send the original customer a bonus (and that bonus should be whatever is appropriate for your business, such as a coupon or a gift certificate, or cash).
This is a quick and simple way to get your cards into circulation. Now, from time to time I've heard complaints by business owners that customers were taking blank cards and copying the cards to give out even more. If that happens, I say great! Assuming you've structured your referral amounts properly, you should never be disappointed that someone is handing out your cards. As long as they hand out your cards and their friends come in and buy, keep sending them the bonuses!
