You got some great advice here.

Also don't forget there are monthly meetings in town all the time where you can NETWORK and market your services! I know many people do that a lot and they get plenty of business and then repeat business by attending those events, meetings. I, myself landed several clients by attending just two business meetings one from Chamber of Commerce and another one from IT semi-annual conference here in my town. Try to do the same. Get your business cards and go to one of those meetings. Some may not require to pay to attend others may require $10 or $15, but it's worth the investment.

Also try to find local listings of IT service providers and get listed there. Also, you might consider getting listed in the yellow pages under IT services or under Internet section or Web developers whatever it is that you do (hosting, web development, design etc)...

It's very hard to advertise without a marketing dollars. I think it's nearly impossible. Many businesses don't have marketing dollars to spend on business at the beginning. That's why I took a typing job and other freelance jobs doing design for ad agencies and sold them all rights to design so I can make enough money to invest into my business for printing slick business cards, placing a few ads, joining some organizations and it's slowly but surely is paying off!