Tip - People enjoy sharing things that make them look good

People enjoy sharing things that make them look good: by Gregory Ciotti. 

At its core, viral marketing is simply the “spread of an idea” that helps market your business or cause. It’s putting material out there that by its very nature attracts attention and discussion.

Perhaps the most objective way to look at the practice of viral marketing is to examine the research of some highly intelligent folks who have dedicated years to deciphering the common elements of viral content.

Wharton professor Jonah Berger did some great work on viral.