Xavier Fok

Master Google Sheets data validation. Build dropdown lists, prevent bad input, and ship spreadsheets your team can actually trust.

Master Excel slicers and timelines. Build interactive dashboards your team can actually use. Real examples for sales, marketing, and KPI reporting.

Master Google Sheets named ranges. Make formulas readable, durable, and self-documenting. Practical examples for solopreneurs and analysts.

Master Excel conditional formatting in 2026. Color scales, data bars, formula-based rules, and real business use cases that turn your spreadsheets into dashboards.

Best free Google Sheets dashboard templates for 2026. Honest reviews of sales, marketing, finance, and KPI dashboards solopreneurs actually use.

Learn Google Apps Script from scratch. Automate Sheets, Gmail, and Drive with practical examples. From your first script to time-driven triggers in one tutorial.

Master IMPORTRANGE in Google Sheets. Pull data across files, build refreshable dashboards, and avoid the auth, refresh, and performance traps.

Master Google Sheets ARRAYFORMULA. Vectorize calculations across whole columns, eliminate fill-down, and build dashboards that update themselves automatically.

Master Google Sheets QUERY in this complete tutorial. SQL-like syntax, real business examples, and the patterns that replace VLOOKUP, FILTER, and SUMIF.

Learn Excel macros without coding. Record, edit, and run your first macro in 20 minutes. Practical examples for solopreneurs and analysts who want to automate Excel.