Very good points. There was one I felt was missing, or could have been integrated with #3 or #7 a bit: Know what your part of the startup's vision is. What is

Very good points. There was one I felt was missing, or could have been integrated with #3 or #7 a bit: Know what your part of the startup's vision is. What is the startups expectations of you in the long term? Do they need some development help to get their product out to get their next round of funding before they run out of runway? Or do they want to give you some time to lead a new product within the bounds of their vision? Or start to spread out from their original vision? If one goes into a startup with a different set of expectations than what the startup has, there will be a lot of friction, and it will waste time of both parties involved.