DDD
https://blog.cleancoder.com/uncle-bob/2012/08/13/the-clean-architecture.html
The Three Laws of TDD
https://www.youtube.com/watch?v=qkblc5WRn-U
Optional - The Mother of All Bikesheds by Stuart Marks
https://www.youtube.com/watch?v=Ej0sss6cq14