Real social media marketing has less to do with what YOU do on social media sites, and what you can convince OTHERS to do. If you really have a good product/service it is a matter of educating others about the benefits of that product/service.
My advice is the following:
1. Create a List of the top bloggers, reporters, writers, and content providers on social media sites.
2. Analyze which are the best
3. Form a plan to influence them to promote your product/service.
Watch a tutorial on real social media marketing
#3 is tricky and is always different. I heard a great example from a marketing company in Boulder, Colorado. They were promoting a bike shop and wanted links & publicity for their client.
They recognized their were many organizations (government, non-profit, and private) that were influential in Boulder. In fact, Boulder has some of the best roads & trials to bike in near Denver.
So instead of creating social media accounts and trying to be friends with all these companies they creatively found a solution to a problem. That problem was too much debris coming from traffic in bike paths.
They first brought awareness to the problem. Reporting on the problem and publishing that information. Then, they created documentation on how the city of Boulder could fix the problem using resources already in place.
THEN, they contacted all the influential organizations in Boulder, sent out press releases, and basically started advocating the clean up of bike paths in Boulder.
The result was massive public relations. Government agencies, universities, non-profits, and other companies that all have large market reach picked up the story and linked to the content (on the client's site). Then, other bloggers, students, and organizations started blogging about it, started tweeting about it, contacted their facebook friends about it, etc...
That is real social media marketing. Brands build great products/services and a campaign like the one above would increase any companies awareness & reputation.