Something that hasn't been mentioned yet is - who has your preferred clients..
1) Before you
2) After You
3) Similar Business to you.
1 & 2 - Show these businesses your quality and service and work out a finders fee.
Offer to pay them per customer that uses your services if they personally introduce you to their clients (via email/letter etc) and signed by them.
Check my blog post (cashflowaddiction.com) to see what you can pay them with no guilt and give you some thoughts on your customers value.
3 - Find the busy shops and offer to do overflow work for them under their name.. Prove your quality first... if their not greedy and they get rush work they can't handle, at least they can take the risk with you and everyone gets paid.
Read keith Ferrazzi's (sp?) Never Eat Alone for insights into networking and cold calling and find ALL the networking events out there that don't clash with your existing work and look for your 1, 2's, 3's. and possible customers.
A lot of people respond to free advice/articles (look around the web
) so find someone who tests their site/advertising religiously and team with them on a newsletter with successful ideas or addressing people's fears/needs and stick the url to sign up for 'Free Advice' on your business cards. It's not hard to find whats 'hot' in google... just put your take and send it to your growing contact list.
Cheers,
Ross.