How to "go viral": Achieving critical mass in social media

Social media and viral marketing are tricky. Success in this arena is not easily pinned down, but that doesn’t mean we should stop trying to identify winning strategies for it. In fact, Melinda Briana Epler of Elements in Time says some of the methods that have been successful may be simpler than you think. Critical mass is not the same for every company - here’s a clear method to gauge whether you've hit your mark.