Mac OS X: symbols that are not on the keyboard

Here is a list of characters I tend to use quite frequently, but that are not shown visually on my MacBook keyboard (Belgian keyboard layout).

Character / SymbolKeyboard shortcutNotes
~Alt-NOr Fn-Backspace in terminal
[Alt-Shift-( 
]Alt-Shift-) 
|Alt-Shift-L 
\Alt-Shift-/