Have you considered the comparison of knowing God and knowing this world? I confess this is a struggle of mine. I often wonder how much of the world we ought to engage in and as we engage how do we keep ourselves Christ-centered? Scripture clearly says to do everything to glory of God (1 Cor. 10:31) but in our fallen condition this is no easy task. Paul says he counts everything as rubbish compared to knowing Christ (Phil. 3:8). I think the answer is two-fold:
First, we have such a small knowledge of God that we cannot imagine the things of the world as rubbish. J.I. Packer says, "When Paul says he counts the things he lost rubbish, or dung (KJV), he means not merely that he does not think of them as having any value, but also that he does not live with them constantly in his mind: what normal person spends his time nostalgically dreaming of manure? Yet this, in effect, is what many of us do. It shows how little we have in the way of true knowledge of God" (Knowing God, p. 25). Our small knowledge of God brings about a dwelling upon the temporary because we do not know God well enough to ponder his majesty with all our thoughts.
Second, the reason doing everything for the glory of God is so hard is because we have a small knowledge of God. We are just not sure how he fits into our lives. I'm not saying we need to stop watching sports, playing video game, watching movies, going out with friends, playing games and so on and so forth but we do need to do those things to the glory of God. The only way that is possible is knowing God. We must pray for wisdom in these areas where we are not really sure how to do them for God's glory. "Entertainment time" or "Free time" are not times to put our Lord and Savior on the shelf. As Christians we have the command to do all to the glory of God therefore we must wrestle with this reality in this fallen world until we are brought into eternity where the struggle will be no more.
Grace upon grace,