Microsoft's spreadsheet program can do way more than you might imagine. These are the hacks and tricks you need to know.

Learn the difference between Excel COUNT and COUNTA, plus TEXTBEFORE and TEXTAFTER tricks, so you clean text and totals with ...

Constants: This is the fastest way to audit a spreadsheet for errors. It finds every cell that contains a manually typed value rather than a formula, so you can make sure someone hasn't hard-coded an ...