Ask everyone for referrals. From this Michael Cage post:
Ask everyone for referrals. People who buy from you? Ask for referrals. People who don’t buy from you? Ask for referrals. Here’s a simple, no-cost way to increase your referrals: Before you deliver a solution, tell your client that you prefer getting new business by referral. Less money spent on advertising means better deals for clients like him/her, and you’d like to work with more people like him/her. Ask them, “after we’ve delivered this and you are thrilled with how things work, would you refer us to your friends/colleagues?” After you’ve delivered, make sure they are thrilled, and only then ask for a list of friends or colleagues who would want the same service and expertise.
Also: Last Year’s Resolution