_The hard thing about hard things_ (Horowitz) has some good pointers, although not for your more practical questions (for which, btw, the answers will vary a lo

_The hard thing about hard things_ (Horowitz) has some good pointers, although not for your more practical questions (for which, btw, the answers will vary a lot based on context - e.g. sector, country, bootstrapping vs external funding, etc.)