All markets have boom and bust cycles, and I think venture capital market has even more exaggerated boom and bust cycles.

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

Profiles aren't journalism.

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

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.

Investing in management means building communication systems, business processes, feedback, and routines that let you scale the business and team as efficiently as possible.

When my dad was in Vietnam, we lost a parent for a year. Thank God we didn't lose a parent for good.