 One of the best weapons against spirit of pornography, lust, or images from previous relationships you can't get rid of is Bible memorization. Now, at first you may say, how is that going to work? You be surprised how that works. Why? You don't get the stuff out until something else stronger pushes it out. These verses in the Bible have life, like I've said, God breath and power. If you're battling with that, this year, just simply find verses on purity, find verses about pure mind and begin to just memorize them once a week. You will see that lust is going to be weakened. Those images will begin to fade away and there will be a purity in your mind that you've never seen before because God's Word makes us pure.