Allah (Subhanahu WaTaala), the all-Merciful and all-Forgiving, declares in the Holy Qur'an:
'Say: O My slaves who have transgressed against themselves (by committing evil deeds and sins)! Despair not of the Mercy of Allah, verily Allah forgives all sins. Truly, He is Oft-Forgiving, Most Merciful.' [Qur'an 39:53]
To leave sins, make sincere intention and use your will-power. Listen to some advices on Purpose of Life:
Dua and Power of Allah
Pious Friendship and its effect on Character
Hakim al-Ummah Mawlana Ashraf Ali Thanawi (Allah have mercy on him) instructed,
'Pray two rakah salah with intention of making repentance and then supplicate as follows;
O Allah! I am Your obstinate disobedient servant.
I want to become obedient but nothing happens with my desires. However, everything is possible only with You.
I want to reform myself but I lack the determination to do so. Only You can reform me.
O Allah! I am extremely inappropriate, severely corrupt and very sinful. I am failing. Please, help me!
I have a weak determination to resist temptations of sinful activities. Please, give me the power to do so.
I do not have anything for salvation (Najaat). Please, provide me with the means of salvation from Your hidden treasures.'
For ten or twelve minutes, make repentance arduously. Then say;
'O Allah! Kindly forgive all the sins that I have committed till now. Though I do not say that I will not commit them again. I am aware that I will do them again. However, I will ask for forgiveness again.'
In this manner daily ask for forgiveness, acknowledge your weakness, supplicate for betterment (islah) and verbally recount your lack of ability, corruption and evilness. In short, debase yourself explicitly in front of Allah daily for ten minutes.
Make this Dua daily before going to sleep.
In few days [inshaAllah] you will observe that from Divine sources your determination will become strong without facing humility and hardships.'
Whenever your tau'bah breaks you should make tau'bah again. Tau'bah is so powerful that it can take a person from the lowest levels of Hellfire and raise him to Paradise.
Make a U-turn in life, wash off your slate of deeds ' eliminate the bad deeds and protect your good deeds.
Method of making Tau'bah:
One should make sincere tau'bah to Allah for one's sins. The requisites of tau'bah are the following:
1. To immediately abstain from the sin.
2. To regret and wish one had never indulged in the sin.
3. To resolve to never commit the sin again.
4. If one have violated the rights of another person it is necessary to seek forgiveness from that person.
Easy Road to Paradise - Golden deeds that lead to success http://www.islameasy.org/EasyRoad_Paradise.php]
Why is Hijab necessary?
May Allah forgive the Ummah and guide us to the right path!
For additional advice, you may re-submit your question with a valid e-mail.
And Allah knows best.
Ask Alimah Team
Note: The rulings giving herein are based on the religious rulings of the Islamic Law and do not have any implications on the Law of the Country. The rulings given hereunder are specifically based on the question posed and should be read in conjunction with the question. AskAlimah.com site bears no responsibility to any party who may or may not act on this answer. AskAlimah.com site being hereby exempted from loss or damage howsoever caused. This answers may not be used as evidence in any Court of Law without prior written consent of the web site.