Repeat after me:

Say firmly: “I will not spend precious moments in reading that which will be of no profit to me, and which only unfits me to be of service to others. I will devote my time and my thoughts to acquiring a fitness for God’s service. I will close my eyes to frivolous and sinful things. My ears are the Lord’s, and I will not listen to the subtle reasoning of the enemy. My voice shall not in any way be subject to a will that is not under the influence of the Spirit of God. My body is the temple of the Holy Spirit, and every power of my being shall be consecrated to worthy pursuits.” [8] – {AH 409.1}