Build more efficient spreadsheets by using the dollar sign to lock specific rows, columns, or permanent addresses when referencing cells.

Users will appreciate a chart that updates right before their eyes. In Microsoft Excel 2007 and Excel 2010, it's as easy as creating a table. In earlier versions, you'll need the formula method.

Excel validation lists avoid blanks and errors with TOCOL(ignore) plus FILTER; the spill range stays stable across worksheets.