You can find a list of all the special characters in the Character Viewer located in your Applications folder.

Easier: You'll need to enable a special menu bar icon by going to System Preferences > Keyboard, clicking on the Keyboard tab, and then toggling on Show Keyboard & Character Viewers in menu bar. After you do that, you'll have this fancy new icon in the upper-right of your screen

Apple logo: Shift-Option-K

Thanks. I new it was there somewhere.

How about knew.

See also:

• http://www.macworld.com/article/2036310/type-special-characters-in-os-x.html
• http://support.apple.com/kb/PH13746