✅Answer:

Many things lead to a good ending, some of which are mentioned below:

1 Imam Sadiq (peace be upon him) said: 'Whoever recites Surah 'Qul Ya Ayyuha al-Kafirun' and Surah 'Qul Huwa Allahu Ahad' in one of the obligatory prayers, Allah will forgive him, his parents, and all of their children, and if this person is wretched and unfortunate, he will be erased from the book of the wretched and will be registered in the book of the fortunate and blessed, and Allah will make him live a life of bliss, cause him to die a martyr, and resurrect him a martyr.'

📚Thawab al-A'mal, p. 127

2 Imam Sadiq (peace be upon him) said: 'Whoever says seven times after the morning and evening prayers: 'O the Merciful, the Compassionate, the Good, the Beneficent, the Great, the Compassionate, the Magnificent, the Generous', Allah, the Exalted and Glorified, will ward off seventy kinds of calamities from him, the least of which are wind, leprosy, and insanity, and if he is wretched and unfortunate, he will be erased from wretchedness and will be written among the fortunate and those with a good ending.'

بِسْمِ اللَّهِ الرَّحْمَنِ الرَّحِیمِ لَا حَوْلَ وَ لَا قُوَّةَ إِلَّا بِاللَّهِ الْعَلِیِّ الْعَظِیمِ

📚Al-Kafi, Vol. 2, p. 531

3 Maymun al-Qaddah said: 'I said to Imam Sadiq (peace be upon him): 'What will be for a person who visits Husayn (peace be upon him) without arrogance or apathy while being aware of his right?' He said: 'For him will be written one thousand accepted Hajj and one thousand accepted Umrah, and if he is wretched, he will be written as blissful and fortunate, and he will always be immersed in the mercy of God.'

📚Kamil al-Ziyarat, p. 164

4 Mufaddal said: 'I said to Imam Sadiq (peace be upon him): 'By what sign is the one who is saved known?' The Imam said: 'The one whose deeds and actions are in agreement with his words and belief (he acts upon the truth that he believes in), then such a person is saved. And the one whose deeds and actions are not in agreement with his belief and words has a borrowed faith.'

📚Mahasin, Vol. 1, p. 252

5 Dilami said: 'I asked Imam Sadiq (peace be upon him) and said: 'May I be sacrificed for you; indeed, your followers say: 'Indeed, faith is of two types: one is firm and one is borrowed and temporary, so teach me something that if I say it, I will complete (bring to an end) my faith.' The Imam said: 'After every obligatory prayer say: 'O the One who grants gifts, O the One who is in a state of giving, do not take back what You have given me.''

6 Imam Sadiq (peace be upon him) said: 'Whoever recites Surah Al-Mu'minun, Allah will make his final affair a blessed one (he will have a good ending), and if he is persistent in reciting it every Friday, his abode will be in the highest Firdaws with the prophets and the messengers.'

رَضِیتُ بِاللَّهِ رَبّاً وَ بِمُحَمَّدٍ(صلی الله علیه و آله) نَبِیّاً وَ بِالْإِسْلَامِ دِیناً وَ بِالْقُرْآنِ کِتَاباً وَ بِالْکَعْبَةِ قِبْلَةً وَ بِعَلِیٍّ وَلِیّاً وَ إِمَاماً وَ بِالْحَسَنِ وَ الْحُسَیْنِ وَ الْأَئِمَّةِ صلوات الله علیهم اللَّهُمَّ إِنِّی رَضِیتُ بِهِمْ أَئِمَّةً فَارْضَنِی لَهُمْ إِنَّکَ عَلَی کُلِّ شَیْ ءٍ قَدِیرٌ

📚Thawab al-A'mal, p. 108

7 The Commander of the Faithful (peace be upon him) said: 'Whoever wears a red Aqeeq ring, Allah will conclude his affair with security and faith.'

📚Makaram al-Akhlaq, p. 87

8 The Commander of the Faithful (peace be upon him) said: The Messenger of God (peace be upon him and his family) said: 'Whoever lives after you and loves you, Allah will make his final affair security and faith until he enters upon me at the pond of Kawthar.'

📚Amali Shaykh Mufid, p. 10

9 Imam Sadiq (peace be upon him) said to Abu Harun: 'O Aba Harun! Indeed, we command our children to say the Tasbihat of Fatimah (peace be upon her) just as we command them to pray. So you must also be constant in it (do not abandon the Tasbihat of Lady Zahra, peace be upon her) because it is impossible for a servant to be constant in it and reach wretchedness.'

📚Al-Kafi, Vol. 3, p. 343

✅Note: According to narrations, the Tasbihat of Lady Zahra (peace be upon her) is said after the obligatory prayers and before sleeping and is of very high importance.

🔟Imam Sadiq (peace be upon him) said in a hadith: 'Some believers, their faith is given to them as a loan, so if such a person prays and insists on the prayer, he will die with faith.'

✅This last point, which is 'supplication', is one of the most important things for a good ending.