How Do I Type Special Characters In Mac OS X?
The best way to see the options for special characters in Mac OS X is to use the Keyboard Viewer. Go to System Preferences->Keyboard and select the Keyboard tab, then check the box that says "Show Keyboard & Character Viewer in menu bar".
Now in your menu bar you can select the Keyboard Viewer. Select Keyboard Viewer and experiment with holding down Option, Option+Shift, etc. to see the different key combinations mapped on the keyboard. You can also use the Character Viewer to select special characters by category.