I used a mobile mechanic the other day to repair the sump on my van and he ended up doing about £400 of work for me. My mate recomended him, he found him on Yell.com my mate has so far spent £1500.00 with him.
I off the cufff said to him do you get much work from yell, 'no' he says '£300 spent with them this year and nothing'.
Made me think though, I get calls from my website, but never ask how they found my website?