Yes, there is a one-stroke command to take you to the next empty cell in column A from anywhere in an Excel worksheet. Here are the steps to create it:

1. Press Alt + F11 to open the Visual Basic Editor.
2. In the Project Explorer window, double-click on the sheet where you want to add the command (e.g. Sheet1).
3. In the code window that opens, paste the following code:
   
   
   Formula:

   Sub GoToNextEmptyCell()
    Range("A" & Rows.Count).End(xlUp).Offset(1, 0).Select
End Sub 

4. Close the Visual Basic Editor.
5. Press Alt + F8 to open the Macros dialog box.
6. Select the GoToNextEmptyCell macro and click on the Options button.
7. In the Shortcut Key field, type a letter or number that you want to use as the shortcut key (e.g. N).
8. Click OK to close the Options dialog box.
9. Click on the Run button to test the macro.

Now you can use the shortcut key you assigned (e.g. Ctrl + Shift + N) to go to the next empty cell in column A from anywhere in the worksheet.