What social media sites should you take a look at?

Just reading "50 Social Sites That Every Business Needs a Presence On." Just in case there's any doubt that you really need full-time staff -- even if you are small -- to manage your social presence, this article should convince you that yes, it is a very full-time job. This article offers a great check-list of places to check out. But you don't need them all initially. Pick the big ones, measure and understand, and then keep adding. And wherever you can, use aggregators like PixelPipe to help update multiple sites simultaneously.