MOST RECOMENDED THIS THINGS;
1)FASTING
2)CHARITY
3)SEEK FORGIVENESS
Recite 70 times each day :

اسْتَغْفِرُ ٱللَّهَ وَاسْالُهُ ٱلتَّوْبَة

astagfirullaaha wa as-aluhut tawbah

I seek forgiveness of Allah, and, repentant, beseech Him.

اسْتَغْفِرُ ٱللَّهَ ٱلَّذِي لاَ إِلٰهَ إِلاَّ هُوَ ٱلرَحْمٰنُ ٱلرَّحِيمُ ٱلْحَيُّ ٱلْقَيُّوْمُ وَاتُوبُ إِلَيْهِ

astaghfirullaahallad’ee laa ilaaha illa huwar rahmano rah’eemul h’ayyul qayyoomu wa atoobu ilayhi

I seek forgiveness of Allah who is “There is no God save He”, the Beneficent, the Merciful; the Ever living, the Eternal, and I turn repentant to Him

Recite the following 1000 times, at any time within the month

لاَ إِلٰهَ إِلاَّ ٱللَّهُ وَلاَ نَعْبُدُ إِلاَّ إِيَّاهُ مُخْلِصِينَ لَهُ ٱلدِّينَ وَلَوْ كَرِهَ ٱلْمُشْرِكُون

laa ilaaha illallaahu wa laa naa’-budu illaa iyyaahu mukhlis’eena lahud deen wa law karihal mushrikoon

There is no god save Allah. We do not worship save “He” alone, making religion pure for Him (only), however much the disbelievers be averse.

Recite the following every night after 15th.

اللّهُمَّ إنْ لَمْ تَكُنْ غَفَرْتَ لَنَا فِيمَا مَضَى مِنْ شَعْبَانَ فَاغْفِرْ لَنَا فِيمَا بَقِيَ مِنْهُ.

Allaahumma In Lam Takun Ghafarta Lanaa Feema Maz”aa Min Shaa’baana Faghfirlanaa Feema Baqiya Minhu

O Allah if Thou has not forgiven us during the previous days of Shaban, then please be merciful to us in the days now follow