Now working on http://www.thinkful.com/ this one stands out as spot on and often ignored:

10. Growth solves (nearly) all problems.

I'm amazed at the number of people who don't understand the difference between improving conversion of people already on your website and driving new users _to_ your site.

While this one is spot on for team members, and opposite when finding investors:

19. Generally, value aptitude over experience.