Initially I'd focus less on your marketing and more on taking advantage of whatever network of contacts you've got. If you can build a client base from people that know you and trust you, that should serve as a source for continued work in the months to come. The idea is to build a base of clients that are satisfied with your work, with the hope that they'll recommend you to people they come in contact with that may need similar services. With every client you serve, think about how you can take the work you've done and re-apply that some effort towards future clients. If you're doing any type of development, and you retain the right to reuse that code, it'll save you time and money down the road.

I'd also recommend speaking with an attorney, or finding a basic contract from an online resource that you can use for jobs you accept.

You may also want to speak to an accountant to make sure you handle the tax-aspect of a business correctly. You can make some mistakes that wind up costing you a lot more in fees and penalties than a meeting with an accountant would cost.

Spend some time on the website Freelance Switch (http://freelanceswitch.com/). It is a good resource for somebody in your position.

Good luck. Working for yourself is rewarding, but it's also definitely a challenge.