Select the whole column: CTRL + SPACE
Select the whole row: SHIFT + SPACE
Select table: SHIFT + CTRL + SPACE bar
Select visible cells only: ALT + ;
Select entire region: CTRL + A
Select range from start cell to far left: SHIFT + Home
Select range from start cell to end in direction of arrow: SHIFT + End + arrow
Select a continuous range of data (e.g. pivot), no matter where your cursor is: CTRL + *
Select blank cells: F5 + ALT + S + K + ENTER
Select all cells with comments: CTRL + SHIFT + O
Select all cells that are directly or indirectly referred to by formulas in the: CTRL + SHIFT + {
Select all cells with formulas that refer directly or indirectly to the active cell: CTRL + SHIFT + }
Selects all the way to a1 from cursor position: CTRL + SHFIT + HOME
Select cells in the direction of arrow: CTRL + SHIFT + Arrow