We hear again and again from founders, that they wish they had waited to start a startup until they came up with an idea they really loved.

Most startups are not nearly focussed enough. They work hard...maybe, but they don't work hard on the right things.

If you don't need it yourself, and you're building something that someone else needs, realize you're at a big disadvantage.

If you're not in college and you don't know a cofounder, the next best thing I think is to go work at an interesting company.

AirBnB happened because Brian Chesky couldn't pay his rent, but did have some space.

So it's worth some real up front time to think through the long term value and the defensibility of the business.

Experience matters for some roles and not others.