1.) The Manifesto
The Manifesto is the viral equivalent of preaching to the choir. Write a passionate, eloquent, or well-researched argument that your niche will wholeheartedly agree with. Since you’ve already got an army of believers who agree with you, they’re already primed and ready to share your argument.
Example: Why I’m a Vegetarian, Dammit, an essay on a vegetarian recipe blog, received over 14,000 shares on StumbleUpon alone.