TL;DR – Have fun with social media. You’re a human talking to other humans, so act like it. Choose the platforms you use and the content you share carefully.
There’s a million of these “Social Media 101″ blogs; this is a little longer than most, but hopefully gives a few more start-up specific insights. Further reading and summaries at the end if you’re pushed for time.
Social media hooziwatsits. Online marketing. Twittermajigs. Ain’t nobody got time for that.