What keyboard shortcuts do you use in Excel?

Things I've discovered recently and found very useful are:

• Shift + Space - select the current row
• Ctrl + Space - select the current column
• Ctrl + Shift + Space - select the block of contiguous cell
• Ctrl + + - Insert (as in the context menu). If the current row is selected, will insert a new row.
• Ctrl + - - Delete (as in the context menu). If the current row is selected, will delete entire row.

What (apart from the normal cut, copy, paste, etc) do you use?

Ctrl + 1 to open the Format dialog.

Shift + F2 to add/edit a cell comment.

Shift + F2, followed by Esc to select the current cell comment, which can then be moved around with the arrow keys (????) or deleted by pressing Del.

Ctrl + ???? to move to the last non-blank cell in a series. This is usually the edge of a table, but not if you have blank cells in the path. Pressing End followed by an arrow key does the same thing.

Alt + F11 to open the VBA editor.

Alt + = to start a SUM() formula and go straight to selecting cells to be summed.

Ctrl + G or F5 to jump to a cell by typing its coordinates (e.g. C3)

Ctrl + Home to jump to the top left, usually A1 unless you you are in a frozen split view, in which case it will jump to the top left of the "data" area.

Ctrl + ; and Ctrl + Shift + ; to insert the current date and time, respectively. I know Ben Lings already posted this one, but I find it indispensable.