"That is the grace of Allah which He bestows on whom He pleases. And Allah is the Owner of Great Bounty." [57:21]

1. Perfecting ones ablution
No worshipper perfects his ablution except that his past and future sins are forgiven. [Hasan, al-Bazzaar]

2. Fasting the month of Ramadan with belief and seeking Allahs reward
"Whoever fasts Ramadhan out of Iman and seeking Allahs reward then his past and future sins are forgiven." [Hasan, Ahmad]

3. Performing the night prayer in Ramadan with belief and seeking Allahs reward
"Whoever stands (in prayer) in Ramadan out of Iman and seeking Allahs reward then his past and future sins are forgiven." [Saheeh an-Nasaai.]

4. Performing the night prayer on the Night of Qadar with belief and seeking Allahs reward
"It (Laylatul-Qadr) is in Ramadan, and expect it in the last ten days; it is on an odd night: on the 21st, or the 23rd, or the 25th, or the 27th, or the 29th, or on the last night (of Ramadan). He who performs the night prayer on it out of belief and seeking Allah's reward his past and future sins are forgiven." [Ahmad]]

5. Praising and thanking Allah after eating and putting ones clothes on.
Whoever ate a food and then said, Praise be to Allah who has fed me this food and provided it for me, without any strength or power on my part, is forgiven his past [and future*] sins. And whoever wears a garment and says, Praise be to Allah who has clothed me with this (garment) and provided it for me, without any strength or power on my part, is forgiven his past and future sins. [Bukhari, Abu Dawud]

6. Getting old in Islam
No one reaches forty years in Islam except that Allah protects him from madness, leprosy and leucoderma. When he is fifty, Allah makes easy his reckoning. When he reaches sixty, Allah grants him repentance. And when he reaches seventy, Allah loves him and the inhabitants of the heavens love him. And when he reaches eighty, Allah accepts his good deeds and overlooks his sins. When he reaches ninety, Allah forgives his past and future sins, he is named the prisoner of Allah on earth and is granted intercession (for forgiveness) for his family. [Hasan, Ibn `Asakir]

7. Leaving the following: performing ruqya (curing with Quran), seeking having ruqya performed on one, cauterization, believing in bad omens.
Narrated Ibn Abbas(RA) the Messenger(SAW) said, I was told: These are your people and amongst them there are seventy thousand who shall enter Paradise without being taken to either account or torment. 'They are those who do not make Ruqya nor seek it, nor believe in bad omens, but trust in their Lord (Allah).' [Bukhari and Muslim]

8. Whose two or three children die and he remains patient
Whoever buries three children, Allah will forbid the Fire for him. [Saheeh, Tabarani]

There are no two Muslim parents whose three children die before reaching puberty except that Allah will enter them into Paradise due to His mercy to the children. It will be said to them, Enter the Paradise, so they will say, Not until our parents enter first. It will be said, Enter the Paradise you and your parents. [Ahmad, an-Nasaai]

Whoever practises ihtasaba (remains content and patient after the death of) three of his offspring will enter Jannah. A woman said, What about two? He said, And two. [Saheeh, an-Nasaai]

To no woman three children die and she remains patient and content, except that she will enter Jannah. Or two (children). [Muslim]

9. Who raises three daughters or sisters and is nice to them
There is no one from my Ummah who takes care of three daughters or three sisters, and is nice to them, except that they will be a veil (protection) for him from the Fire. [Saheeh, al-Bayhaqi and Al-Bukhari in Al-Adab]

10. Defending the honor of a Muslim
Whoever defends the honor of his brother in absence has the right over Allah to be freed from the Fire. [Saheeh Ahmad, al-Tabarani]

11. Sincerity to Allah
No servant who says la ilaha ill Allah, seeking the pleasure of Allah, will reach the Day of Judgment, except that Allah will forbid the Fire for him. [Ahmad, al-Bukhari] Hafidh Ibn Hajr said, Its not like that (i.e. not entering the Fire at all) for everyone who believed in tawheed and worshipped, but it is specific for the sincere, and sincerity (ikhlas) requires the realization of its meaning by the heart. One cannot imagine that the heart will reach that while persisting upon sins, as the heart would be filled with the love and fear of Allah, whereupon limbs will embark upon obedience and leave disobedience.

12. Crying out of fear of Allah
No man who cried out of fear of Allah will enter the Fire until the milk returns to the udder, and dust in the path of Allah (jihad) and the smoke of the Fire cannot go together. [Ahmad, at-Tirmidhi]

13. Performing the prayer in congregation for forty days while reaching the opening takbeer
Whoever prays to Allah for four days in congregation, reaching the opening takbeer, will have two written for him: freedom from the Fire and freedom from hypocrisy. [Hasan. at-Tirmidhi]

14. Being consistent in praying four rak`ats before Dhuhr and after it
Whoever is consistent in praying four units of prayer before Dhuhr and four after it, Fire will be forbidden for him. [Saheeh. Abu Dawood]]

15. Being consistent in praying before sunrise and before sunset.
No one will enter Fire who prays before sunrise and after sunset. [Ahmad, Muslim] - meaning the Fajr and `Asr prayers.

16. Dust of Jihad
The dust of Jihad and the smoke of the Fire will never coexist within a servant, and greed and Iman will never coexist in the heart of a servant. [Saheeh An-Nasaai]

17. Killing a mushrik in war
A kafir and one who killed him will never be together in the Fire. [Muslim, Abu Dawud]

18. Good character
Whoever is easy-going, easy to deal with and kindhearted, Allah will forbid the Fire for him. [Saheeh. Al-Hakim]]

19. Freeing slaves
Whoever frees a believing slave it will be his salvation from the Fire. [Saheeh Ahmad]

20. Salat ut-Tasbeeh (Tasbeeh Prayer)
There is an unusual difference of opinion about this one. Scholars have greatly differed about the authenticity of the relevant narrations, with their rulings ranging from fabricated to authentic. In a narration, Al-Mustamir ar-Rayan relates, Whoever prays it will be forgiven his past and future sins, what he did secretly and what he did openly. [Mentioned by Ibn Hajar in Ma`rifat al-Khisal al-Mukaffirah, Allah knows best.]