Let [Ctrl]Z become you best friend in Outlook
Pressing [Ctrl]Z reverses many actions in Outlook. For example, if you move a message to a different folder, delete a message, or type a sentence you don’t want to include in an email, just press [Ctrl]Z to undo the action. You must press [Ctrl]Z, however, before performing any other action. This doesn’t work for everything (i.e., you can’t undo sending a message or meeting request), but give it a try next time you accidentally perform a step. You may be pleasantly surprised at the power of this handy little keyboard shortcut.