If you can just learn to think about the market first, you will have a big leg up on most people starting startups.

It's difficult to get large groups of people, to the extreme levels of focus and productivity that you need, for a startup to be successful.

You need conviction in your own beliefs, and the willingness to ignore others naysaying.

The biggest PR hack you can do, is not hire a PR firm.

Remember that the idea will expand, and become more ambitious as you go.

In YC experience, 2 or 3 co-founders seems to be about perfect.

You have to be decisive. Indecisiveness is a startup killer.