Here are some interesting examples of campaigns that have gone viral and marketing tactics that worked.
Create campaigns that do not use stereotypical images and context
Images of your product in a supermodel’s hand as she sits looking bored and passive are not going to work in a viral marketing context. To advertise their new LED TVs, Samsung strapped some LED lights onto sheep and ‘created’ works of art. The jump from LED TVs to LED sheep is a big one, you have to make that jump to get to the 19 million views of this video.