speedey makes a good point about yellow pages...very expenzive, and who reads it? I like small neighborhood newspapers...folks somehow trust what they see there. After about 6 months, word of mouth may be self sustaining, with no ad necessary.
This works> put on a very neat, clean, tradesman-look outfit....perhaps khaki work trousers, pressed shirt.....linger around the aisles at HD or Lowes. There are people there THIRSTY for help, and if they can even find someone, he/she is not likely to be of a lot of help. When you do see an employee helping someone...eavesdrop on the conversation. If you see the employee stumbling or offering bad advice, GENTLY step in and politely offer something like this: " what you can do is ......." etc. The employee is grateful for the rescue, and if you use your body lanquage correctly, he will take the hint and wander off, leaving you with the customer. Sometimes, you will just get a "thank you" but you will be surprised how many times this entree will lead to a job.