If you remember Social Media is at the top of the SEO pyramid. It is also the area that is the hardest for small businesses to put into action.
I have found this great checklist, it is such a simple plan to follow. Actually a plan like this is would not be very time consuming, once you have all of the Social Media set up. But the really sensible thing for a small business would be to use only the social media your target customers are using. And only use the social media you are will to put into action.