Usually I only think about something useful from my memory when it comes up in a situation, and I haven’t had to use some (or been able to, my illness affects my thinking) in a while but here’s what I thought of:
Philosophy: Falsificationism, epistemology, ontology, empiricism, induction, analysis and synthesis, ethics, logic, reasoning, linking observation and inference, mental modelling
Science: Design of experiments, confounding variables, lab conditions, the difficulty of proof (double blind randomised trials etc), metrology, social science, sociology, the history of scientific philosophy, psychology. Biases, the limitations of the mind, evolutionary history.
Magic: Exploiting assumptions, providing a subjective reality based on those assumptions, the assumptions people make when they have a partial understanding of what’s going on, egoism, social norms and their effects on truth.
Mathematics: Formal logic, set theory, algebra, proofs, statistical significance, number theory, combinatorics, graph theory, game theory, first principles, axioms.
Programming: Typical programming errors, the limitations of code, how to make scripts and tools, the nature of thinking when designing and writing solutions, troubleshooting, empathy for the difficulty of the job
Poetry: Metric foot, beauty in language, communication, linguistic affordance, metaphor, writing efficiency, note taking
Graphic Design: UI elements, colour theory, the nature of contrast in colour, size, tone, position etc.
Cybernetics: Control systems, Ashby’s law of requisite variety
Hiking: Mapping, exploration, finding paths, being wrong, getting lost without panicking, preparation, perception failures and limitations of view (scouting).
Board games: Social engagement, design of board games taught me about the difficulties of formalising gaming behaviour into a rulebook, existing rulebooks (see pages 1 to 280 of the Magic The Gathering comprehensive rules), problem solving, planning around dynamic changes to the context, hidden information, resource management.
First draft, I’m very tired today. I don’t always use these nor remember to but I find them helpful in testing or have found them helpful with regards to theory or applied skills.