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A batch of the best highlights from what Siddish's read, .

The 5 Domains of Expertise: **Tactics:** *specific actions and techniques used to achieve success* - PM: How did Pinterest do SEO? - Eng: DSLs, CRDTs, serverless, Causal Ishikawa diagrams **Processes:** *methodologies and procedures followed to streamline and ensure smooth execution* - PM: How are projects done at Amazon? - Eng: Agile, TDD, Pair programming, Design of Experiments **Frameworks:** *structured models to analyze and solve complex problems systemically and effectively* - PM: How should I segment customers? How to find core customer needs? - Eng: Blameless RCA, Feedback loops, Database selection **Principles:** *fundamental beliefs and guidelines that inform decision-making* - PM: Which features should get more prominence? Hierarchy of user needs - Eng: Inherently ephemeral service, Security: Everyone's responsibility, System Design **Mindset:** *mental attitudes and psychological aspects to help you navigate the challenges* - PM: How to manage your own thinking & psychology? - Eng: Inquisitive/Curious to study black boxes, Experimentation

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![](https://i0.wp.com/www.spencergreenberg.com/wp-content/uploads/2024/05/False7.png?resize=750%2C751&ssl=1)

Categorizing types of beliefs: Valuable Truths, Bitter Pills, Philosophical Disorders and Helpful Falsehoods

Spencer Greenberg

"We would never again endure a period where we went weeks without visible evidence of progress."

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