Ctrl + Shift + Function
Ctrl + Shift + F3 Displays the (Insert > Name > Create) dialog box
Ctrl + Shift + F6 Moves to the previous open workbook or window
Ctrl + Shift + F10 Activates the Menu Bar or Shortcut Characters in 2007
Ctrl + Shift + F12 Displays the (File > Print) dialog box
Ctrl + Numbers
Ctrl + 0 Hides the columns in the current selection
Ctrl + 1 Displays the formatting dialog box
Ctrl + 2 Toggles bold on the current selection
Ctrl + 3 Toggles italics on the current selection
Ctrl + 4 Toggles underlining on the current selection
Ctrl + 5 Toggles the strikethrough of text on the current selection
Ctrl + 6 Toggles between hiding, displaying
Ctrl + 8 Toggles the display of Outline symbols on the active worksheet
Ctrl + 9 Hides the rows in the current selection (Format > Row > Hide)
Ctrl + Shift + 0 Unhides the columns in the current selection
Ctrl + Shift + 2 Enters the value from the cell directly above into the active cell
Ctrl + Shift + 8 Selects the current region (surrounded by blank rows and columns)
Ctrl + Shift + 9 Unhides the rows in the current selection