How do you best avoid temptation on abusing drugs again?

I would say the best thing to do is pray! If anything go to an AAA class if they will let you or talk to EX drug addicts and they will tell you to run the hek away from drugs. In fact talk with your parents about your desire to do wrong tell them you need help or talk to a pastor.

Start regularly going to Church and praying for the temptation to go away. Know this that Satan knows your weakness and he wants to choose your vulnerablest weakness.. because sin can and does wreck lives.... and destroys the great plans God has for you.. but don't worry you can always get back up on your feet and repent.. here are some verses on sin and temptation...

--(I John 1:7-10) 7 But if we walk in the light, as he is in the light, we have fellowship with one another, and the blood of Jesus Christ, his Son, cleanses us from all sin. 8 If we say that we have no sin, we deceive ourselves, and the truth is not in us. 9 If we confess our sins, he is faithful and righteous to forgive us the sins, and to cleanse us from all unrighteousness. 10 If we say that we haven't sinned, we make him a liar, and his Word is not in us.

--

Romans 6:17-1917But thanks be to God that, though you used to be slaves to sin, you wholeheartedly obeyed the form of teaching to which you were entrusted. 18You have been set free from sin and have become slaves to righteousness.

19I put this in human terms because you are weak in your natural selves. Just as you used to offer the parts of your body in slavery to impurity and to ever-increasing wickedness, so now offer them in slavery to righteousness leading to holiness.

1 Peter 5:9

Resist him (Satan), standing firm in the faith, because you know that your brothers throughout the world are undergoing the same kind of sufferings.

James 1:12

Blessed is the man who perseveres under trial, because when he has stood the test, he will receive the crown of lifethat God has promised to those who love him.

1 Corinthians 15:55-57

55"Where, O death, is your victory?

Where, O death, is your sting?"[a] 56The sting of death is sin, and the power of sin is the law. 57But thanks be to God! He gives us the victory through our Lord Jesus Christ.

Hebrews 11:25

Choosing rather to suffer affliction with the people of God, than to enjoy the pleasures of sin for a season;

WE ARE STRUGGLING AGAINST SATAN AND DEMONS IN A SPIRITUAL WAR FARE:

Ephesians 6:12

For our struggle is not against flesh and blood, but against the rulers, against the authorities, against the powers of this dark world and against the spiritual forces of evil in the heavenly realms.

If you've accepted Christ as your Savior call on Him to help you :) God can help you carry the burden of your temptation.. and ALSO... know your a child of God anyone who confesses that Jesus is Christ...and... God can help you handle this temptation.. keep going to Church and giving your burden to the Lord and opening up about this issue with your family and Christian friends

1 John 4:2

2This is how you can recognize the Spirit of God: Every spirit that acknowledges that Jesus Christ has come in the flesh is from God,