Here are some time savers that any pro should know:

Holding shift while inserting a CD disables AutoPlay
Holding shift when selecting "Restart Windows" does not reboot fully to the BIOS level.
"Windows Key - PrintScrn" displays the Device Manager
"Windows Key - P" displays the Printer Control Panel
"Windows Key - E" displays the Windows Explorer

In an Explorer or Folder view:
Ctrl-"Numpad +"   Arranges columns to proper width

In the WinIPcfg program:
Ctrl-C  copies the displayed information to the clipboard