The 5 identification of a mu'min (believer)

بِسۡمِ ٱللهِ ٱلرَّحۡمَـٰنِ ٱلرَّحِيمِ

إِنَّمَا ٱلۡمُؤۡمِنُونَ ٱلَّذِينَ إِذَا ذُكِرَ ٱللَّهُ وَجِلَتۡ قُلُوبُہُمۡ وَإِذَا تُلِيَتۡ عَلَيۡہِمۡ ءَايَـٰتُهُ ۥ زَادَتۡہُمۡ إِيمَـٰنً۬ا وَعَلَىٰ رَبِّهِمۡ يَتَوَكَّلُونَ (٢)

The believers are only those who, when Allah is mentioned, their hearts become fearful, and when His verses are recited to them, it increases them in faith; and upon their Lord they rely -

ٱلَّذِينَ يُقِيمُونَ ٱلصَّلَوٰةَ وَمِمَّا رَزَقۡنَـٰهُمۡ يُنفِقُونَ (٣)

 The ones who establish prayer, and from what We have provided them, they spend.

أُوْلَـٰٓٮِٕكَ هُمُ ٱلۡمُؤۡمِنُونَ حَقًّ۬ا‌ۚ لَّهُمۡ دَرَجَـٰتٌ عِندَ رَبِّهِمۡ وَمَغۡفِرَةٌ۬ وَرِزۡقٌ۬ ڪَرِيمٌ۬ (٤)

Those are the believers, truly. For them are degrees [of high position] with their Lord and forgiveness and noble provision. (Surah Al-Anfal 8:2-4)

http://quran.com/8/2-4 

1) When Allah is mentioned, their hearts will tremble,

2) Their Faith will increase upon hearing the verses of Allah,

3) Tawakal (putting their trust) in Allah,

4) Establish prayers,

5) Give out from what Allah have given to them.