You would benefit more greatly by concentrating on building branded presences on local directories, and possibly doing some free classified ads- both online and hard copy. Above all else ask clients to rate them on their service!
FEEDBACK from clients is king: eg: my wife was purposely injured by a female racist Gynecologist, and then forced to pay for follow up office visits that did no good. I insisted that she find someone else. We looked online, found a Gynecologist with terrific client feedback, almost like it was fake. However visits to him proved his competency, care, and diagnostic skills. His repiutation is NOT FAKE!
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Janet has an ecellent answer. Unfortunately, too long for me to read. One word: G+/ G maps. (Was that 2 words?) Get your G profile in order, and a youtube account.
I'm trying to rack my head around how a small local business like say a hairdresser or dentist will have SEO in the post Penguin environment. I mean, how relevant will content marketing going to be for your local dentist? I keep on hearing that after Penguin you have to have killer content that everyone what's to share with everyone else to rank in SERPs. But I mean, what's "killer content" for a local dentist and who goes around sharing their local dentist's content anyway? How much social media engagement for a local dentist should you actually expect? Let's say I'm going to get a root-canal, the last thing I can imagine myself doing is going on the dentists blog and liking or sharing their content.
It just doesn't seem realistic for small local businesses or am I missing something?