Here is something I started noticing not to long ago. If you go through your yellow pages, Google, and/or craigslist and look for lawnmowing companies there are dozens of them and 75% of the companies do not have a website.
Simply call their contact # introduce yourself and explain that you can have them a professional looking website up and running in less than a week for under $500 bucks. If they accept take it over to to Warriors for Hire, Elance, RentCoder which ever you prefer. Have them create a basic but professional website for no more than $200 and pocket the rest. If you are slightly efficient a Dreamweaver you can handle this.
I also found this works well for tv installers, handymen, and a few other businesses where individuals have low start up cost.
To take it even a step further keep all the contact information for the individuals you do business. In a few months follow up with them and offer your services to put an autoresponder in place for a small fee $150 so that they can capture leads and make more sales.