According to the psalmist, in the Word of God we find whatever is true, noble, right, pure, lovely, admirable, excellent, and praiseworthy. We have to spend time with the sweet, precious Word of God. We need to read it daily. We need to think about it constantly. We need to so immerse ourselves in the Word that we can't go anywhere and can't do anything without being aware of God and thinking of His Word.
E Be Spiritually Correct.
Fill your mind with whatever is true, noble, right, pure, lovely, admirable, excellent, and praiseworthy. Look for good things. Don't just avoid rotten books. Read good ones. Drink in stories and poems and ideas that stretch the mind and lift the spirit.