Early in a startup, product decisions should be hunch driven. Later on, product decisions should be data driven.

Most adults I know start their Internet session at Google, and most kids I know start their Internet session at either Facebook or MySpace.

Ideas that most people derided as ridiculous have produced the best outcomes. Don't do the obvious thing.

Early in a startup, product decisions should be hunch driven. Later on, product decisions should be data driven.

Profiles aren't journalism.

The strategy of Tumblr is very elegant.. The atomic unit of user experience is the same as the ads.

If you have a native monetization system where the atomic unit of content is the ad unit, that scales down all the way to a small screen experience. That's why Twitter is performing so well on mobile.