>Only a specific type of product or business or piece of content will go viral—it not only has to be worth spreading, it has to provoke a desire in people to spread it.

How can you make sure of this when you're in the early stages of an idea? There needs to be a cheatsheet or something.

I've found that entire industries don't really work with growth hacking. B2B or specialized software, for instance. How can someone refer a friend when they probably don't even know anyone with a need for your product/service?