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An excellent list. A few years ago Tao and Gowers initiated a “math tricks wiki”. They never organized it but you can find individual articles (e.g., on using Zorn’s lemma) by googling the above search words.
Gappy (Giuseppe Paleologo)x.com
Lucas Danielian
@lucasdanielian
Lucas Testro
@lucastestro
George Krachtopoulos
@georgekrax
Luciano Gonsales
@lucag
Lucas Tavares Gomes
@teste
Lucas Lee-Tyson
@llt
Lucas Bianchi
@lucasbianchicfa