From one hit on our website we secured a £12,000 per year contract. I asked the client where he found us, he replied google. We are listed on several free sites. One particular brings me regular work, none as good as the job I mentioned admittedly.
Consequently I have just invested in a new website that is being professionally designed and will be ready in the next week or so. We will continue with our free advertising but we are also paying to have professional search engine optimization. In previous years we have done well from yellow pages but mostly our leads come via the web nowadays.
I hope this helps
Kev