There is so much of do's and don'ts out there for startup advice. Most of them is personal experience that can be applied to only a few. Becoming overtly general takes the point away. This list given by the author is something I have personally realized over the course of last 3 years working on my idea. Its quite good that he could bring this out succinctly. Now I would say go work on your idea and figure your way out rather than looking for advices :-)