Sin is first a nature governed by the devil before it is an act. Therefore in other to overcome sin(the nature) and sinning(the act), you must relinquish yourself and efforts to Jesus Christ, trusting that He finished the deal at the cross and enforced it in hell for your sake, thus with that understanding, you can yield to Jesus in the following ways:
1. Repent of the Sin and receive your forgiveness and cleansing by faith. Under Grace, you are not begging God for the forgiveness of your sins because scriptures says He has forgiven you of all your trespasses and sins in Christ Jesus Eph.2:1 & Col.2:13, rather you are solely required to confess your sins, repenting of them before the Lord 1John1:9. Once this is done, scriptures says The Lord is faithful and just to forgive you of your sins and cleanse you from all unrighteousness. So the only thing required of you from then on is to receive your forgiveness and cleansing from all unrighteousness by faith.
2. Make a quality decision of sincerity against sin- For Grace thrives and blossoms in sincerity and in Truth 1Corinthians 5:7-8. The way to keep the unleavened bread of Grace, working in your life is to stay sincere unto God. Grace comes to you without conditions and sustained with an open heart towards God always. Many persons seek to make excuses for their sins by Grace, using Grace as a reason to sin. But they fail to realise that by being comfortable in their sins, the power of Grace cannot be activated in them to set them free. I am yet to meet a true believer who loves to sin. Though a believer may fall into one sin or the other at interval, or may struggle with an addiction but once you take hold of the truth of Gods Grace in your life, the Grace of God in you would make uncomfortable with that act of sin, because the righteousness of God in you wars against sin, because you are now dead to sin 1Pet2:24. So, a Christian under Grace does not pursue after sin but dwells in the righteousness of God by faith(which is the predominant force in a believers life) Rom.6:14. But when a person seeks to always make excuses for his/her sin, then it reveals that the seed of truth in the word of Grace unto salvation is not in them because we are saved by the incorruptible seed of the word of God which abides forever in us 1Pet.1:23. Therefore a true believer does not like to sin, rather a true believer is always looking for a way out of sinning. Therefore by sincerity of heart and truth(openness towards God, no matter what), Grace is kept alive in our lives.