If you prefer to use the keyboard rather than the mouse, here are some useful key sequences.
Press:
Windows-D to jump to the desktop (minimize all open windows)
Windows-E to open Windows Explorer
Windows-F to open Find
Windows-L to log off Windows
Windows-M to minimize all open windows (or Shift-Windows-M to undo
this command)
Windows-R to open the Run window
Windows-Break to open the System Properties dialog box
Windows-F1 to open Help
Windows-Tab to cycle through the Taskbar buttons