With new social networks constantly emerging, it's hard to keep the rules of social media straight. If I repin this image on Pinterest, am I violating copyright law? What's the different between RT and MT on Twitter? What's the official hashtag of the Republican National Convention; #GOPconvention or #RNC2012? Does it matter?

Fortunately, there are some rules that apply to all social networks universally. As a part of their Social Media Road Map, Fast Company has put together this infographic of best practices as defined by some of the internet's savviest social media users: What would you add to the list?