taqwa. Indeed, it causes them to enter Paradise, and that is because Paradise has been prepared for those, who have Taqwa.

Indeed, it causes them to enter Paradise, and that is because Paradise has been prepared for those, who have Taqwa.

Be quick in the race for forgiveness from your Lord and for a Garden whose width is that (of the whole) of the heavens and of the earth, prepared for the righteous..{3:133}. 

Be ye foremost (in seeking) Forgiveness from your Lord, and a Garden (of Bliss), the width whereof is as the width of Heaven and earth, prepared for those who believe in Allah and His messengers..{57:21}. 

Abdullah bin busr Radi Allahu Anhu narrated: The Prophet Sallallahu Alayhi Wasallam said:

Gladtidings for one who finds an abundance of seeking forgiveness in his Book of Deeds. {ibn Maja: 3818}. 

Astaghfirullah

Note: Read Above dua as much as you can everyday

and also you can read other dua's from Quran/Hadith.