Via HN. While I am not working in a startup, totally agree with the development lessons 45 - 53. Firm believer in weekly development sprint. The advantages of adhering to a weekly development and release cycle are shorter feedback time and breaking down of bigger tasks into smaller and manageable chunk.
How I wish I can introduce this into my personal life and projects. Tried a few times but failed miserably. Time is running up and age is catching up on me.