In one of the chapters he references Psalm 119:33-37 (specifically verse 37) as a way to battle any type of sexual temptation, and I love the verses so much that now I'm committing them to memory.
He suggests printing out verse 37 and putting in on the top of your TV and computer as a reminder to dwell on the truth and life that comes with the Lord, not the worthless images the world constantly throws at us. Alcorn states, "Lust is fed by whatever we've deposited in our brains that it can get its claws on. What's in our brains is what we've allowed in through our senses. The images and words in our minds must come either from specific things our eyes have seen and our ears have heard or an imaginative conglomerate of such input" (42). If we think the TV shows or movies we are watching, or the images we see on the Internet, are not having an effect on our minds, thoughts, and ability to fight sexual temptation--we are sadly mistaken.