The practice of meditating on the Word will be most beneficial for right thinking, because when you are meditating on the scriptures your mind is occupied with right thoughts.  And the scriptures will also guide you in what else to think about in the world besides the scriptures.  One of the passages that specifically tell us that is Philippians 4:8.  Here Paul outlines for us seven things we should think about; or I think we could also look at it as seven qualities or virtues we should seek out and think about in different things in the world, such as in people, books, movies, and institutions. 

But we are not to just casually think over them; the word translated “think on” or “meditate on” (logizesthe), suggests more than just thinking.  The word actually means to take inventory, to reason, to reckon, and to esteem.  Adam Clark suggests that…