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Extend the selection to the last cell down

Windows shortcut 
CtrlShift
Mac shortcut 

If the active cell is empty, Excel will extend the selection to the first non-empty cell below the active cell. If the active cell is non-empty, Excel will extend the selection on the last non-empty cell below the active cell. On a Mac, the command key (⌘) can be used instead of the control key.

Related videos

The videos below demonstrate this shortcut.
In this video, we'll take a quick look at the information provided by the status bar. The status bar provides real-time data about currently selected cells and can give you a lot of useful information.
In this video, we'll look at how to use conditional formatting to shade every other row in a table. This is sometimes called "zebra striping".
In this video, we'll look at how to create 3D references, an elegant way to analyze multiple worksheets with simple formulas.
In this video, we'll look at how to create a pie chart in Excel. Pie charts show a "part to whole" relationship, and they work best with a limited number of categories.
In this video, we compare formulas and pivot tables side-by-side to build the same reports to demonstrate how powerful and easy to use pivot tables are.