Adding hours : the result is incorrect !
Convert hours from time format to decimal format and vice versa
Drop-down list or combox box : create such a list with DATA VALIDATION
Format : create a special format to hide the content of a cell
Zero values : how to hide them
Macros : the macro button added to the Quick Access toolbar disappears when file is closed and opened again (2007)
Move or copy a colum/row without overwriting or having to insert first
Multiply hours by an hourly rate
New limits in Excel 2007
Replace wildcard characters
Shortcuts
Subtotals : select only the results and not the intermediate levels (VISIBLE CELLS ONLY)
VLOOKUP and hyperlinks : no link - error message "cannot open specified file"