Do you have any ideas for a simple, affordable way to advertise my web design company?

Question

I have bery little money to spend on advertising, and I can't think of any effective way to do it. Obviously I could register it with search engines, but that costs some amount of money a month. The only idea I have so far is flyers, but I doubt that will have an luck in getting clients. Other than that I can go around to small businesses and give them a page of information and pray that they might be interested....I don't know I am kind of desperate for ideas/help......