The Design, Topography and Graphics free monthly newsletter is chock full of tips and articles on...design, topography and graphics. It's editor says they keep articles forevah, so they will be there when you need them down the line.
This month there was a set of posts and links regarding social media, including SN in 2012 and things you need in your organization's policies to use social media. Not deep, but useful. http://www.graphic-design.com/web-design/resources/social-media-tracks
If you're interested, here is the host company's link and a link to sign up for the newsletter. I've found lots of interesting articles on all kinds of things. http://www.graphic-design.com/
Newsletter signup: http://dtgnews.com/mailman/listinfo/dtgnews_dtgnews.com