People that are really smart and that can learn new things can almost always find a role in the company as time goes on.

Starting a business is like riding a wave between life and death. If you can hang on long enough, you're bound to succeed

No matter what you choose, build stuff and be around smart people.

... you want to be proud of how much you can get done with a small numbers of employees.

You should always know how you're doing against your metrics. You should always have a weekly review meeting every week.

As the company grows and about this 25 or so employee size, your main job shifts from building a great product to building a great company.

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