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Enter same data in multiple cells

Windows shortcut 
CtrlEnter
Mac shortcut 
Return

With multiple cells selected, this shortcut will enter the same data in all cells in the selection at once. This is a great way to skip a copy & paste step. Cells do not need to be contiguous; use Control (Win) or Command (Mac) to select non-contiguous cells before using Control + Enter.

Related videos

The videos below demonstrate this shortcut.
In this video, we'll look at how to create a named constant. This is a useful way to create a name that doesn't appear in a cell on the worksheet.
In this video, we'll look at a way to fill in missing data using a formula created with the IF and ISBLANK functions.
In this video, we show you a really handy shortcut for entering data into more than one cell at the same time.
In this video, we look at how to simulate a random drawing to pick winners in a contest with Excel, using the RAND and RANK functions together.
In this video, we'll look at how to use conditional formatting to shade alternating groups of rows - groups of 3 rows, groups of 4 rows, and so on.