What are some keyboard tricks?

They are called short cuts because they make a function on a computer without using the mouse or any other pointing devices. A good example would be the following:

F1: Help

CTRL+ESC: Open Start menu

ALT+TAB: Switch between open programs

ALT+F4: Quit program

SHIFT+DELETE: Delete item permanently

SHIFT+right click: Displays a shortcut menu containing alternative commands SHIFT+double click: Runs the alternate default command (the second item on the menu)

ALT+double click: Displays properties

SHIFT+DELETE: Deletes an item immediately without placing it in the Recycle Bin