We are very busy in this world for our study, our research, family, firends, etc. However, we are more busy in the here after (in akhirat, in yaumul qiyamah). It is described in Quran Surah/Verses (QS)’Abasa (80),
فَإِذَا جَآءَتِ ٱلصَّآخَّةُ
But when there comes the Deafening Blast (QS’Abasa 80:33)
يَوْمَ يَفِرُّ ٱلْمَرْءُ مِنْ أَخِيهِ
On the Day a man will flee from his brother, (Indonesia: pada hari itu manusia lari dari saudaranya,) (QS’Abasa 80:34)
And his mother and his father (QS: ‘Abasa 80:35)
And his wife and his children, (QS: ‘Abasa 80:36)
لِكُلِّ ٱمْرِئٍ مِّنْهُمْ يَوْمَئِذٍ شَأْنٌ يُغْنِيهِ
For every man, that Day, will be a matter adequate for him. (Indonesia: Setiap orang dari mereka pada hari itu mempunyai urusan yang menyibukkan). (QS: ‘Abasa 80:37)
However, our life is very short when we compare the time in the here after (akhirat) equal to 1,000 years in this world. As if our life is only around 1.5 – 2.4 hours (in here after time) when our age is around 65 – 100 years in this world. That’s why in last verse of QS An-Naziat says
كَأَنَّهُمْ يَوْمَ يَرَوْنَهَا لَمْ يَلْبَثُوٓا۟ إِلَّا عَشِيَّةً أَوْ ضُحَىٰهَا
It will be, on the Day they see it, as though they had not remained [in the world] except for an afternoon or a morning thereof.
(QS: An Naazi’at 79:46)
Currently, we are tested with this short time of life in this world to reach the paradise or to fall in the hell. Before we came to this world through our mother, we have agreed in the world of ruh (soul) that we will be tested in this world, in the earth. We have also confirmed that Allah is our Rabb (The one who creates and maintains the universe). We have also accepted the Trust/Amanah even though the heaven/sky, the earth, the mountain have refused to accept
إِنَّا عَرَضْنَا ٱلْأَمَانَةَ عَلَى ٱلسَّمٰوٰتِ وَٱلْأَرْضِ وَٱلْجِبَالِ فَأَبَيْنَ أَن يَحْمِلْنَهَا وَأَشْفَقْنَ مِنْهَا وَحَمَلَهَا ٱلْإِنسٰنُ ۖ إِنَّهُۥ كَانَ ظَلُومًا جَهُولًا
Indeed, we offered the Trust to the heavens and the earth and the mountains, and they declined to bear it and feared it; but man [undertook to] bear it. Indeed, he was unjust and ignorant.
(Al Ahzab 33:72)
Indeed, we are not remembering all the memories when we are in the time before coming to this world, because we are now in examination with this short period of time around 1.5-2.4 hours (unit time in the here after). For the fairness, all the memories of us were erased, then we enter the examination world in the earth or current universe. We are such as traveller or stranger in this short transit/temporary world to be tested, to collect all provision for the next long journey after our death in the world of grave, and the here after.
On the authority of Ibn ‘Umar, sallallahu ‘alaihi, who said: The Messenger of Allah, sallallahu ‘alayhi wasallam, took me by the shoulder and said: “Be in this world as though you were a stranger or a traveler/wayfarer.” Ibn ‘Umar used to say: “When evening comes, do not expect (to live till) morning, and when morning comes, do not expect (to live till) evening. Take from your health (a preparation) for your illness, and from your life for your death.”[Al-Bukhari]. 
In this short period of time in our life of examination, we need to multiply our good deeds/amal to Allah SWT.
It goods to know that our goodd deeds will not save us. It will makes us to enter the paradise/jannah. However, our good deeds are to make Allah happy to us, hence He will give His Grace/Rahmah/Mercy to make us to enter the paradise.
Imam Al-Bukhari narrated in his Sahih, Hadits Imam Bukhari Nomor 5982 
عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ
that Abu Hurairah (may Allah be pleased with him) said:
(Indonesia: dari [Abu Hurairah] radliallahu ‘anhu dia berkata:)
قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ
The Messenger of Allah (peace and blessings of Allah be upon him) said: (Indonesia: Rasulullah shallallahu ‘alaihi wasallam bersabda:)
لَنْ يُنَجِّيَ أَحَدًا مِنْكُمْ عَمَلُهُ
“No one of you will be saved because of his deeds.”
(Indonesia: “Salah seorang dari kalian tidak akan dapat diselamatkan oleh amalnya,
وَلَا أَنْتَ يَا رَسُولَ اللَّهِ
They (the companions) said: “Not even you, O Messenger of Allah?”
(Indonesia: maka para sahabat bertanya; ‘Tidak juga dengan engkau wahai Rasulullah? ‘)
He said: “Not even me, (Indonesia:
Beliau menjawab: ‘Tidak juga saya,)
إِلَّا أَنْ يَتَغَمَّدَنِي اللَّهُ بِرَحْمَةٍ
unless Allah bestows mercy upon me.(Indonesia: hanya saja Allah telah melimpahkan rahmat-Nya kepadaku.)
So do good deeds properly, (Indonesia: Maka beramallah kalian sesuai sunnah)
sincerely and moderately, (Indonesia: dan berlakulah dengan imbang)
and worship Allah in the forenoon (Indonesia: berangkatlah di pagi hari)
and in the afternoon, (Indonesia: dan berangkatlah di sore hari,)
وَشَيْءٌ مِنْ الدُّلْجَةِ
and during a part of the night, (Indonesia: dan (lakukanlah) sedikit waktu (untuk shalat) di malam hari,)
and adopt a moderate course, adopt a moderate course (he said it twice) (Indonesia: niat dan niat)
whereby you will reach your target (Paradise).” (Indonesia: maka kalian akan sampai.”)
Ibnul Qoyyim says in his book:
Al-Hafiz Ibn Rajab Al-Hanbali says: “this hadith includes a great principle and an essential rule. Many rulings can be derived from it especially in regards to matters of conduct in worship and seeking and walking on the path of Allah the Almighty.
The great principle is that the good deeds of man does not save him from hellfire, nor does it enter him paradise, but rather one is saved from hellfire and is entered paradise by the forgiveness and mercy of Allah the Almighty.
The probability to obtain the Grace from Allah increases when we multipliy our good deeds. If the intention of our good deeds is not for Allah, Allah refuses our good deeds. We have to make that our intention to do anything in this world is only for Allah, according to laa ilaaha illa Allah (لا اله الّاالله), there is no God (the One that we worship to, we pray to, and the One who is our destination). All of our good deeds also must follow the example of Rasulullah saw (peace and blessings of Allag be upon him (pbuh) according to Muhammadan Rasulullah (محمّد رسول الله). By doing all of those, increasing our good deeds, the intention is only for Allah, and follow the sunnah/way of Muhammad Rasulullah saw, may Allah rewards us his Grace/Mercy so that we can enter the paradise/jannah.
There are many stories as examples.
The story of companion, Bilal r.a. (may Allah be pleased with him), when Rasulullah saw heard the sound of Bilal’s sandals/foodstep in the paradise.
Abu Huraira reported that Allah’s Messenger (sal Allahu alaihi wa sallam) said to Bilal: “Bilal, tell me which act you did at the time of the morning prayer for which you hope to receive good reward, for I heard during the night the sound of your footsteps before me in Paradise?” Bilal (radi Allahu anhu) replied: “I did not do any act in Islam for which I hope to get any benefit, but this, that when I perform complete ablution during the night or day I observe prayer with that purification, what Allah has ordained for me to pray.” [Sahih Muslim]
What Bilal (radi Allahu anhu) used to do is not that difficult to do. He would try to stay in a state of purity, and whenever he did wudhu or ghusl, he would pray nafl rakaat with that wudhu. This enabled his footsteps to precede those of Rasul Allah (sal Allahu alaihi wa sallam) in Paradise. We could try for the same .
There were also story about the one who worship for 500 years.
A man in the past worshipped Allah (سبحانه وتعالى) continuously for 500 years. He was granted a shelter on top of a mountain that was surrounded by salty water. However, Allah (سبحانه وتعالى) caused a stream of sweet water to flow through the mountain for that individual. The man would drink from this water and use it to make ablution. Allah (سبحانه وتعالى) also raised a pomegranate tree from which the man would eat one fruit every day.
One day, this person supplicated to Allah (سبحانه وتعالى) that, “Oh Allah (سبحانه وتعالى), bring my death while I am in the state of prostration.” Allah (سبحانه وتعالى) accepted this dua of his. Whenever Jibreel (عليه السلام) came down to the Earth, he found this man prostrating to Allah (سبحانه وتعالى). Jibreel (عليه السلام) said that on the day of Judgement, Allah (سبحانه وتعالى) will tell the angels to take this individual to Paradise through His mercy. However, this man will insist that he should enter paradise through the good deeds that he had performed.
Then, Allah (سبحانه وتعالى) will tell the angels to compare his good deeds with the blessings that were given to him in the world. It will be seen that 500 years of his worship does not even equal to the gift of eye sight that was given to him by Allah (سبحانه وتعالى). The angels will be asked to take him toward the hell fire. Then the man will plead, “Oh Allah (سبحانه وتعالى)! Enter me into Paradise only through Your mercy.” At that point, the following discussion will take place between Allah (سبحانه وتعالى) and that man.
Allah (سبحانه وتعالى): Oh my servant, who created you?
The worshipper: Oh Allah (سبحانه وتعالى), You have created me.
Allah (سبحانه وتعالى): Were you created because of the good deeds you have done or because of My mercy?
The worshipper: Because of Your mercy.
Allah (سبحانه وتعالى): Who granted you the ability to worship for 500 years?
The worshipper: Oh the Almighty! You have granted me that ability.
Allah (سبحانه وتعالى): Who placed you on the mountain surrounded by the ocean? Who caused a stream of sweet water to flow in between the salty water? Who caused a pomegranate tree to grow for you? Who granted you death while in the state of prostration?
The worshipper: Oh the Sustainer of the Worlds! You have done all of these.
Then Allah (سبحانه وتعالى) will say, “All these have happened due to My mercy and you too will enter Paradise only through My Mercy.” [HR Al-Hakim] 
There was also story about companions that becomes the people of paradise because before he went ti sleep, he always forgives every one who makes mistake to him.
The Messenger of Allah (sallaAllahu ‘alayhi wasallam) was sitting with a group of the sahabah (RAA) in the masjid and he said “A man will now enter [who is] from the people of Paradise.” and a sahabi walked in. Later it happened again, and then a third time. ‘Abdullah ibn ‘Amr ibn al-‘aas (RAA) wanted to find out what was so special about this man, so he asked the man if he can stay over his house for three days. (He made up an excuse). The man allowed him to stay. ‘Abdullah noticed that the man didn’t do anything out of the ordinary: He didn’t fast all the time, he slept some of the night and prayed some of the night, and so on. So after the three days, ‘Abdullah told him the real reason why he requested to stay with him, and he asked him what it was that could be the reason why he was from the people of Jannah.
The man (RA) couldn’t think of anything, but after a bit he said “Every night, before I go to sleep, I forgive whoever has wronged me. I remove any bad feelings towards anyone from my heart.” (Kitab al-Zuhd by Ibn al-Mubarak – Number 694 – Source).
This Hadith is also in Musnad Ahmad and is hasan according to some (Source), but weak according to others (Source). Please find the detail in .
Finally, let’s increase our good deeds, set the intention only for Allah SWT, and follow the example of Prophet Muhammad saw.