Useful Keyboard Shortcuts

Programm Shortcuts:

Ctrl-left arrow moves the cursor to the beginning of the previous word, while Ctrl-right arrow to the beginning of the next word
Ctrl-Shift-left arrow or right arrow highlights the full previous or next word
Ctrl-Backspace deletes the word on the left of the cursor
Ctrl-Home moves the cursor to the top of the document, while Ctrl-End to the end of it

Windows Shortcuts:
Ctrl-Shift-Esc opens the Windows Task Manager. (Windows 7 and newer) .
Ctrl-Shift-click on a taskbar icon to open the program with administrative privileges.(Windows 7 and newer)
Shift-click on a taskbar icon to launch another instance of the program
Alt-Tab lets you switch between open programs and windows, Alt-Shift-Tab walks through the listing backwards.
Alt-F4 closes the active item or exits the active program
Alt-Esc cycles through the list of open programs in the order they have been opened.
Windows-d displays the desktop, while Windows-m minimizes all windows to show the desktop, and Windows-Shift-m restores the windows to their original position.
Windows-e opens My Computer in Windows Explorer
Windows-r opens the run box to start programs from there.