According to Imam Hasan bin Ali Al Askari (as) The signs of a true believer are five:-
1) Recite 51 Rak—a’t Salaat during the 24 hours of the day (17 Rak—a’ts obligatory, + 34 Rak—a’ts in Naafilah Salaats).
2) Be in Karbala for Ziyarat of Imam Husayn (as)/other martyrs, or at least recite Ziyarat of the Holy Imam as given
3) To wear a ring in the right hand.
4) To put the forehead on the earth (preferably on the earth of Karbala) in prostration.
5) To pronounce “Bismillahir-Rah’maanir-Rah’eem” in clear and loud voice while praying the salats.