Access Mac Special Characters with the Character Viewer
You can access the Character Viewer in most Mac apps by just hitting Command+Option+T
From this special character viewer, you can easily insert any special character and browse through all of the special characters available to Mac OS X. You can also use it to insert special characters in foreign languages, assuming you have the foreign language packs installed. This is a lot easier than trying to memorize some of the more obscure key commands for typing accented letters and the Apple logo !