Des raccourcis peu usuels

From MacFixIt

(Command + Shift + L) - Opens a new Safari window and performs a Google search for highlighted text when performed.
(Command + Option + F) - Places cursor in the Google search bar in Safari.
(Command + Delete) - Moves the highlighted file (in Finder) directly to the trash--a great timesaver when deleting multiple files throughout your system.
(Command + Option + Control + 8) - Freaks your unsuspecting friends out by inverting the colors on their screen. This is actually an accessibility feature in OS X that helps vision-impaired users.
(Command + D) - Moves the directory to the Desktop folder when performed in Save, Save as, or Download windows. Most programs have a default save or download folder (or default to your last saved folder). This command is very useful when you are not sure where you want to save your file.