Exceljet

Quick, clean, and to the point

Select current region around active cell

Windows shortcut 
CtrlShift*
Mac shortcut 
Space

This shortcut will extend the selection around the active cell to include the "current region" around the active cell. See Ctrl A, and ⌘ A for very similar behavior.

This is the best Excel training site I have ever seen. -Kedy
Excel foundational video course
Excel Pivot Table video training course
Excel formulas and functions video training course
Excel Shortcuts Video Course
Excel Charts video training course