The Ultimate Social Media Etiquette Handbook by Tamar Weinberg
The link above was shared by a friend on Facebook, Cameon Shiflett. I found it interesting because I have so many friends (especially on facebook and twitter) who break these very rules daily! I recently went through my friends' lists and deleted people I didn't know, barely knew, or had no professional need to share a page with them. I was surprised at how many I had accumulated during the relatively short time I've been using SM sites. I just thought I'd share with you so you can rate your own etiquette performance and your friends!