R1C1 coordinates provide a predictable map for auditing formulas and writing universal VBA macros.
Use Microsoft 365 View > Navigation to find, rename, or hide sheets in one place, keeping large workbooks tidy and easier to manage.
Excel's query tool reshapes messy imports into 1NF, so AVERAGEIFS replaces hacks and your summaries run faster.
I traded the static results of Flash Fill for dynamic formulas that update automatically.