Very often, a Christian's behaviour is measured against the Ten Commandments, or the 7 Deadly Sins. Additionally, there's a lot of other do's and don't in the Bible. The Apostle Paul has the following to say about obeying God's law and other do's and don'ts:
(Paul also struggled against sin like us!)
Romans 7: 21So I find this law at work: When I want to do good, evil is right there with me. 22For in my inner being I delight in God's law; 23but I see another law at work in the members of my body, waging war against the law of my mind and making me a prisoner of the law of sin at work within my members. 24What a wretched man I am!
Romans 8: 5Those who live according to the sinful nature have their minds set on what that nature desires; but those who live in accordance with the Spirit have their minds set on what the Spirit desires. 6The mind of sinful man is death, but the mind controlled by the Spirit is life and peace.....
(... a Spirit-filled life....)
Romans 8: 9You, however, are controlled not by the sinful nature but by the Spirit, if the Spirit of God lives in you.
Romans 8: 12Therefore, brothers, we have an obligation—but it is not to the sinful nature, to live according to it. 13For if you live according to the sinful nature, you will die; but if by the Spirit you put to death the misdeeds of the body, you will live
(Paul does not say that a Spirit-led believer automatically does not sin, but he says we have an obligation to live according to it. The Bible gives us this assurance....)
Romans 8: 1Therefore, there is now no condemnation for those who are in Christ Jesus, 2because through Christ Jesus the law of the Spirit of life set me free from the law of sin and death.
(The Apostle Peter has this to say about leading a godly life that will ensure you are on the right track to heaven)
2 Peter 1: 5..... make every effort to add to your faith goodness; and to goodness, knowledge; 6and to knowledge, self-control; and to self-control, perseverance; and to perseverance, godliness; 7and to godliness, brotherly kindness; and to brotherly kindness, love. 8For if you possess these qualities in increasing measure, they will keep you from being ineffective and unproductive in your knowledge of our Lord Jesus Christ. 9But if anyone does not have them, he is nearsighted and blind, and has forgotten that he has been cleansed from his past sins. 10Therefore, my brothers, be all the more eager to make your calling and election sure. For if you do these things, you will never fall, 11and you will receive a rich welcome into the eternal kingdom of our Lord and Savior Jesus Christ.