We all know the most cost efficient way to grow business is through referrals from current clients, friends, family, colleagues. Your circle of influence, especially current clients, should be your extended sales force, whether they know it or not. Remind them that if they are happy with your services, tell others and offer them an incentive: a dinner for two, tickets to an event, etc. Also, ask your clients for business/contacts they think may benefit from your products and/or services.