Every major communication tool on the Internet has spam and abuse problems. All email services, blogging services and social networks have to dedicate a significant amount of resources and time to fighting abuse and protecting their users.

Hard things are valuable; easy things are not so valuable. Reaching the mountaintop is rewarding because it is hard. If it was easy, everybody would do it.

Failure of your company is not failure in life. Failure in your relationships is.

News in general doesn't matter most of the time, and most people would be far better off if they spent their time consuming less news and more ideas that have more lasting import.

The things that keep nagging at you are the ones worth exploring.

User experience is everything. It always has been, but it's undervalued and underinvested in. If you don't know user-centered design, study it. Hire people who know it. Obsess over it. Live and breathe it. Get your whole company on board.

I tried to be a ski bum when I stepped away from Twitter, and I wasn't a very good skier.