The most superior way of asking for forgiveness from Allah

Narrated Shaddad bin Aus (May Allah be pleased with him): The Prophet Sall-Allaahu ‘alayhi wa sallam (May Allaah bless him and grant him peace). said 

"The most superior way of asking for forgiveness from Allah is:

اللّهـمَّ أَنْتَ رَبِّـي لا إلهَ إلاّ أَنْتَ ، خَلَقْتَنـي وَأَنا عَبْـدُك ، وَأَنا عَلـى عَهْـدِكَ وَوَعْـدِكَ ما اسْتَـطَعْـت ، أَعـوذُبِكَ مِنْ شَـرِّ ما صَنَـعْت ، أَبـوءُ لَـكَ بِنِعْـمَتِـكَ عَلَـيَّ وَأَبـوءُ بِذَنْـبي فَاغْفـِرْ لي فَإِنَّـهُ لا يَغْـفِرُ الذُّنـوبَ إِلاّ أَنْتَ .

Allahumma anta rabbee la ilaha illa ant, khalaqtanee wa-ana AAabduk, wa-ana AAala AAahdika wawaAAdika mas-tataAAt, aAAoothu bika min sharri ma sanaAAt, aboo-o laka biniAAmatika AAalay, wa-aboo-o bithanbee, faghfir lee fa-innahu la yaghfiruth-thunooba illa ant.

‘O Allah, You are my Lord, none has the right to be worshipped except You, You created me and I am Your servant and I abide to Your covenant and promise as best I can, I take refuge in You from the evil of which I have committed. I acknowledge Your favour upon me and I acknowledge my sin, so forgive me, for verily none can forgive sin except You.’

"If somebody recites it during the day with firm faith in it, and dies on the same day before the evening, he will be from the people of Paradise; and if somebody recites it at night with firm faith in it, and dies before the morning, he will be from the people of Paradise."

(Sahih Al Bukhari, Book # 75, Hadith # 318)