Well, before receiving a Die Hard medal and a Fanatic medal, Ты have to start at a Dedicated Фан medal, unless Ты miraculously receive a Die Hard before a Dedicated Fan.
With getting Dedicated Фан medals, there's a variety of things Ты can do to earn it; Ты can post videos, post images, post links, and create numerous pop Тест Вопросы (I did that once, and ended up with a medal days later :D). If Ты don't know how to post those, Ты can simply create fanpicks and answer-questions, and answer Вопросы или Комментарий on fanpicks. You'll have to spend a lot of your time on this fanclub to receive the medal.
It may take a while for Ты to get one, but if Ты work hard and don't have too many expectations, it will happen. :)
Now, a Die Hard is sort of like the секунда phase for a medal. To me, Fanpop Медали go through three stages; Dedicated, Die Hard, Fanatic. Over time, due to hard work, the medal progresses from Green (Dedicated) to red (Fanatic).
To get the Die-Hard, Ты simply do what Ты have been doing for a Dedicated Фан medal. If it works out, you'll have your Die-Hard :)