Try to supplicate this dua every single day to become a habit.
1. Dua That Guarantees You Forgiveness (Sahih Al-Bukhari)
Prophet Muhammad SAW (PBUH) said:
"Whoever gets up at night and says:
La ilaha 'illa Allaahu, wahdahu la shareeka 
lahul mulku, wa lahul hamdu, wa huwa ala kulli shayin qadeer. 
Subhana allaahi, wal hamdu lillaahi, wa la illaaha ila Allaah,
wa Allaahu akbar, waLa hawla wa la quwwata illa billaah.

There is none worthy of worship in truth except Allah Alone, 
He has no partners, He has the Dominion and for Him is all praise, 
and He is capable of all things, praise is for Him, 
and Far is Allah from imperfection, 
and There is none worthy of worship in truth except Allah, 
and Allah is the Greatest, 
there is no capability nor is there any power except with Allah.

"Then he says:
Allaahumma aghfirlee.

O Allaah forgive me! 

Or he supplicates and his supplication is answered, 
and if he makes Wudhu and prays, then his prayer is accepted.

2. Dua That Guarantees You Jannah (Sahih Al-Jami, An-Nasa'i, Ibn Hibban)
Prophet Muhammad SAW (PBUH) said:
"Whoever recites Ayatul Kursi, verse 255 from chapter number 2, 
Surat Al Baqarah after every obligatory prayer,
then nothing is stopping him or her from entering Jannah, 
except one thing: Death."

3. Dua That Wipe Away Sins (Sahih Al-Bukhari, Muslim, At-Tirmidhi)
Prophet Muhammad SAW (PBUH) said:
"Whoever says:
Subhana allaahi, wa bihamdih

How far from imperfections Allah is, and I praise Him.

"a hundred times during the day, his sins are wiped away,
even if they are like the foam of the sea."

4. Phrases That Are Heavier On The Scales Than An Entire Morning Of
   Recitation (Sahih Muslim)
Prophet Muhammad SAW (PBUH) said:
"I recited four words three times after I had left you. 
If these are to be weighed against all you have recited since morning, 
these will be heavier." These are:
Subhan-Allahi wa bihamdihi, 'adada khalqihi, wa rida nafsihi, 
wa zinatah 'arshihi, wa midada kalimatihi.

Allah is free from imperfection and I begin with His praise, 
as many times as the number of His creatures, 
in accordance with His Good Pleasure, equal to the weight of His Throne
and equal to the ink that may be used in recording the words
(for His Praise).

5. Dua To Stay On The Right Path (Sahih Muslim)

Ya musarrifa-l quloobi sarrif qalbi ala ta’atik.

O, Allah! The One Who turns the hearts, 
turn my heart towards Your obedience.

6. Dua To Be Save From Totrments Of Grave

Allahumma inni wa a'udhu bika min adhabil qabri

O, Allah! Saves us from the torments of the grave.

7. Dua For The Best In The Dunya And Hereafter

Rabbana atina fid-dunya hasanatan, wa fil'akhirati hasanatan,
waqina 'adhaban-nar.

O, Allah! Our Lord give us all the good of this world,
and the good of the hereafter, 
and Save us from the punishment of the Fire.

8. Dua To Help Pay Off Your Debts (Sahih At-Tirmidhi)

Allahum-makfinee bi halaalika 'an haraamika wa aghninee bifadhlika
'amman siwaaka

O, Allah! Suffice me with what You have allowed instead of what You
have forbidden, and make me independent of all others besides You.

9. Dua Of The Treasures Of Paradise (Sahih Al-Bukhari, At-Tirmidhi)
Prophet Muhammad SAW (PBUH) said:
"Shall I not tell you of a word which is one of the treasures of 
Paradise?"

La hawla wa la quwaata illa billah

There is no power and no strength except with Allah.

10. Dua To Literally Boost Your Energy
Before you sleep recite: 
Subhana allaah 33x, Alhamdulilah 33x, 
Allahu akbar 34x

11. Dua That Protects You From All Evil (Sahih Ibn Majah)

Bismillaahil-lathee laa yadhurru ma'as-mihi shay'un fil-'ardhi wa laa 
fis-samaa'i wa Huwas-Samee'ul-'Aleem.

In the Name of Allah, Who with His Name nothing can cause harm in the 
earth nor in the heavens, and He is the All-Hearing, the All-Knowing.

12. Dua To Get Prophet Muhammad SAW (PBUH) Help in Yawm Al Qiyamah
(Sahih Al-Bukhari)
Prophet Muhammad SAW (PBUH) said:
"Whoever says the following, after hearing the call of adhan, 
the call of prayer I will intercede for them yawm al qiyamah."

Allaahumma Rabba haathihid-da 'watit-taammati wassalaatil-qaa'imatah, 
Aati Muhammadanil-waseelata walfadheelah, Wab 'ath-hu 
maqaamam-mahmoodanil-lathee wa'adtah.

O, Allah! the Lord of this perfect call, and the lord of the prayer 
that is about to be established, grant Prophet Muhammad (PBUH)
al waseela, Resurrect him with that status, that is so praise worthy,
which you have already promised.

13. Dua Forgiveness All Believers

Allahumma ighfir lil muslimeena wal-muslimaat, wal-mu'mineena 
wal-mu'minaat, al-ahyaa'i minhom wal-amwat.

O, Allah! forgive the Muslim men and Muslim women, the believing men 
and the believing women, the alive from them and the dead.

14. Benefits Reciting Surah Ikhlas
- Reciting 3 times a day is equivalent to reciting the whole Qur'an.
- Reciting 10 times a day and Allah will build for him a house in paradise.

15. Sayyidul Istighfar (Sahih Al-Bukhari, Sahih Al-Jami, At-Tirmidhi)
Prophet Muhammad SAW (PBUH) said: If somebody recites this invocation 
(given below) during the day, and if he should die then, he will be 
from the people of Jannah. And if he recites it in the night, and if he 
should die on the same day, he will be from the people of Jannah.” 

Allahuma anta Rabbi la ilaha illa anta, Khalaqtani wa ana 'Abduka, wa ana
'ala 'ahdika wa wa 'dika mastata 'tu, A 'udhu bika min Sharri ma sana'tu,
abu'u Laka bini'matika'alaiya, wa abu'u laka bidhanbi faghfir lee fa innahu
la yaghfiru adhdhunuba illa anta.

O, Allah! You are my Lord! None has the right to be worshipped but You. You
created me and I am Your slave, and I am faithful to my convenant and my 
promise as much as I can. I seek refuge with You from all the evil I have
done. I acknowledge before You all the blessings You have bestowed upon me,
and I confess to You all my sins. So I entreat You to forgive my sins, for
nobody can forgive sins except You.
Insya Allah, may it benefits you guys. Ameen