There are a lot of articles out there about how to effectively use social media to enhance your product or service. Foursquare, Google+, Pinterest -- there are so many it's dizzying.
You're right; the options to connect and engage through social media are very thick and constantly changing. Social media can greatly enhance sales and a brand if done correctly but a wrong step can also turn off customers and tarnish a reputation -- just think of Alec Baldwin's Twitter rants about American Airlines or Charlie Sheen's #winning hashtag.
Check out this chart, which shows how much social media has evolved over the years. Note how the landscape is divided into categories: publishing, sharing, playing, networking, buying and localization.
I would first focus on the center of the circle and then experiment with expanding your social architecture....
Via Daniel J Smith