I love the way this article explains some of the key issues with designing distributed systems and how to solve them. It uses the illustration of a theme park and the rides - very clever and a fun read, which is unusual for a distributed systems article!
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When I am developing software I build an internal mental model of how I expect things to work. As I learn more I tweak that model - or if it is not working as I expect then I tweak the code to match the model I have. Over time that model grows and evolves.
I’ve written a lot about questions, and answers.
In the book Questions are the answer there is a quote from Peter Drucker:
When I was at school they had a building which was mainly for the use of those doing their O Levels (the old name for what is now GCSE examinations). There were only two reasons I would get to go to the building: one was for music lessons as for some reason the music department was located there. The second was to attend the weekly youth night they held for each year group.