How can I become a Dedicated Fan, Die-Hard 팬 또는 Fanatic of a club?

This has been asked many times.

Just do what 당신 normally do: get on the club often and 제출하기 things to it.
Sooner 또는 later, you'll get a medal.
There isn't any specific way, that's the F4's secret.

Just continue to do what 당신 normally do, and you'll have one in no time ^^