Facebook is not an unstoppable juggernaut. There are a lot of other things people can do on the web.

To see things differently requires you to be wired a little differently.

The more entrepreneurs in the world that are getting their ideas financed, the more great companies there are going to be that we can all invest in.

My venture investing career has three phases, all roughly 6-8 years long. The first, at Euclid, was software to Internet. The second, at Flatiron, was Internet to bubble. And the third, at USV, has been web 2 to mobile. I have always used a new firm to denote a new investment phase for me. Throw away the old. Start with the new.

We need new medical approaches to preventing and/or curing disease. We need new scientific approaches to generating, storing, and being more efficient with energy. Maybe we need more space exploration. Maybe we need more undersea exploration.

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

It's not easy for an entrepreneur to find the time to blog. But for those who do it, it is a great tool to communicate with the various stakeholders in their business and build a reputation for thought leadership.