How do I use custom TTF fonts in my Cocos2d iPhone apps?
I searched for this for a while and decided to post as question and answer for people wanting to implement.
The solution is quite easy.
Find the fonts you want and download them. This website has a huge collection of free fonts.
Add the font files to your project. 
Add the font names to your info.plist file using the array below as an example.
Find the font's name; Double click the font file and use the font name shown in the title of the window. In this example it is "Action Man"

To use the font name the way you would normally:
CCLabel* myLabel = [CCLabel labelWithString:@"Some Text" fontName:@"Action Man" fontSize:18];
Add this to your info.plist file:
UIAppFonts
Action Man Bold.ttf
AdineKirnberg-S.ttf