It kills me when I watch my non-technical colleague editing a document by repeatedly selecting words, right-clicking, slowly scrolling down to either Copy or Cu

It kills me when I watch my non-technical colleague editing a document by repeatedly selecting words, right-clicking, slowly scrolling down to either Copy or Cut, then click somewhere else, right-click, slowly scroll down to Paste... He also regularly "checks" spreadsheets with a handheld calculator... Sometimes going as far as not using formulas at all.