1. Making Potential Users Ask Publicly To Get In
2. The World’s Strictest Invite System
3. Splitting Up Blog And Library Content
4. Having A Strong Point Of View
5. We Don’t Blog About Our Product
6. Link Roundups For Users And Relationships
7. Using Facebook And Twitter Very Differently
8. A/B Testing The Hell Out Of Everything
9. Being Smart About Paid User Acquisition
10. Knowing Just Who The Hell Is Signing Up