Word of mouth advertising is the best advertising there is. Also, make sure every job looks it's very best because word of mouth talk about bad work works against you just as quickly. Talk to everyone you know and let them know you're in the business. Don't be afraid to ask for business. Every job you get is advertising of your work. You make have to take on jobs that aren't't the most profitable but it will get you out in the market and the more people see you working, the more opportunity to pick up other work.