Selects the entire worksheet.
CTRL+A
Quick Reply.
Ctrl + R
Starts a new line in the same cell.
ALT+ENTER
Selects an entire row in a worksheet.
SHIFT+SPACEBAR
Fills the selected cell range with the current entry.
CTRL+ENTER
Selects an entire column in a worksheet.
CTRL+SPACEBAR
Tab Left to next Sheet. (Excel)
CTRL+PgUp
Enters the current date.
CTRL+;
Tab Right to next Sheet. (Excel)
CTRL+PgDn