fervent prayer is key

If anyone who is addicted has a desire to overcome, then there is a way to spiritual freedom—a way to escape from bondage—a way that is proven. It begins with prayer—sincere, fervent, and constant communication with the Creator of our spirits and bodies, our Heavenly Father. It is the same principle in breaking a bad habit or repenting from sin of any kind. The formula for having our heart, our body, our mind, and our spirit transformed is found in the scriptures.
The prophet Mormon counseled us: “Wherefore, my beloved brethren, pray unto the Father with all the energy of heart, that ye may be filled with this love … ; that ye may become the sons of God; … that we may be purified even as he is pure” (Moroni 7:48)...
 
To those who are dealing with an addiction personally or within your family, I repeat, fervent prayer is key to gaining the spiritual strength to find peace and overcome an addictive craving. Heavenly Father loves all of His children, so thank Him and express sincere faith in Him. Ask Him for the strength to overcome the addiction you are experiencing. Set aside all pride and turn your life and your heart to Him. Ask to be filled with the power of Christ’s pure love. You may have to do this many times, but I testify to you that your body, mind, and spirit can be transformed, cleansed, and made whole, and you will be freed. Jesus said, “I am the light of the world: he that followeth me shall not walk in darkness, but shall have the light of life” (John 8:12).




M. Russell Ballard, "O That Cunning Plan of the Evil One," General Conference October 2010