A. Admit you are a sinner.
"There is not one righteous, not even one... for all have sinned and fall short of the glory of God."
Romans 3:10, 23. (See Romans 5:8; 6:23)

Ask God's forgiveness.

"Everyone who calls on the name of the Lord will be saved." Romans 10:13

B. Believe in Jesus
(Put your trust in him) as your only hope of salvation.
"For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life." John 3:16 (See John 14:6)

Become a child of God by receiving Christ.
"To all who receive him, to those who believed in his name, he gave the right to become children of God."
John 1:12 (See Revelation 3:20)

C. Confess that Jesus is your Lord.

"If you confess with your mouth, 'Jesus is Lord', believe in your heart that God raised him from the dead, you will be saved." Romans 10:9 (See verse 10)

Next say this prayer believing with all your heart -

Lord Jesus, I know that I am a sinner. Lord the sinful life that I lived separated me from you. Lord, forgive me of my sins. I know I owe a sin debt that I cannot pay.
Lord I believe that you died on the cross and rose on the third day to pay my sin debt.

Lord I'm sorry for my sins. From this day forward I will put all my trust in you, Lord show me how to live a Christian life in Jesus name, Amen.