MS Excel: Quick Click Movement

If you Want to find out where a column ends or where the next blank cell is in the column.

Select a cell:
Double-click the bottom edge of the selected cell,
(Take cursor to botton edge and when it becomes + sign made of four arrows)
and you're taken to the last filled cell below the selected cell in the current column.
This trick works for rows nd column and in all four directions.
So, for example, if you want to find the last filled cell or the next empty cell in the current row:

Select a cell:
Double-click the right edge of the cell.