> Similarly, not trying to learn everything was a big deal.
This is one of my recent decision. Previously I would jump to every shiny frameworks and try to learn every fancy programming languages. This drained my energy so much I had to stop doing it. Instead I have decided to learn ubiquitous tools e.g math, algorithms and data structures, etc.
This is one thing I need to learn to say. I have been doing lots of stuff other devs want and hating myself for not being able to say no.