tl;dr: Engineering productivity often comes from accumulating small, high-leverage tricks that don't require deep expertise—like using `fzf` for fuzzy shell history search, `git log -S` to find commits that added/removed a string, `explain analyze` in Postgres/MySQL, or replacing `find` with shell globstar patterns. Company-specific nuggets (who to ask, which data source debugs what, how to trigger a rolling restart) are equally valuable. The author suggests senior engineers share one trick per day with their team as a low-overhead way to spread knowledge.