"Allah forgives one who is CONSTANT in doing good deeds"

وَإِنِّى لَغَفَّارٌ۬ لِّمَن تَابَ وَءَامَنَ وَعَمِلَ صَـٰلِحً۬ا ثُمَّ ٱهۡتَدَىٰ

“And verily, I am indeed forgiving to him who
1) Repents
2) Believes
3) Does righteous good deeds
4) And then remains constant in doing them (till his death).”

(Qur'an 20:82)