Repenting from sin

Assalam alaykum wa rahmatullah
Dear questioner,
May Allah bless you and increase you in good.
Repentance
A Muslim who commits sins and afterward repents by meeting the conditions of repentance has repented. That is the minimum that is required. However, adab or etiquette requires that we should repent for all our shortcomings and wrong actions continuously.
Allah says, “Surely Allah loves those who always turn to Him in repentance and those who purify themselves.” [Quran 2:222]
Have a good opinion of Allah
One should believe that Allah forgave you when you repented; that is from having a good opinion of Allah.
The Prophet ( peace and blessings be upon him) said, “Allah the Most High said, ‘I am as My servant thinks (expects) I am. I am with him when he mentions Me. If he mentions Me to himself, I mention him to Myself; and if he mentions Me in an assembly, I mention him in an assembly greater than it. If he draws near to Me a hand’s length, I draw near to him an arm’s length. And if he comes to Me walking, I go to him at speed.'”
[Bukhari]
As your question correctly assumed, frequently repenting is from the etiquette of every good believer; likewise, frequently supplicating is also from excellence.
Remember Allah after prayers.
After every prayer, you are encouraged to repent and intend to be the most excellent servant. There is a beautiful hadith that teaches us in extension to what the Prophet told Mu’adh.
Mu’adh (Allah be pleased with him) reported: The Messenger of Allah (Allah bless him and give him peace) took hold of my hand and said, “O Mu’adh! By Allah I love you, so I advise you never to forget to recite after every prayer:

   اللَّهُمَّ أَعِنِّيْ عَلَى ذِكْرِكَ وَشُكْرِكَ وَحُسْنِ عِبَادَتِكَ

“O Allah, help me remember You, to be grateful to You, and to worship You excellently.” [Abu Dawud]
May Allah grant us all a constant state of turning in repentance to Allah.
[Imam] Yama Niazi