Check over your standards of what you watch on TV. In Philipians 4:8 it says:
Finally, brothers, whatever is true, whatever is noble, whatever is right, whatever is pure, whatever is lovely, whatever is admirable—if anything is excellent or praiseworthy—think about such things.
Look at what you are watching. How does it make you think? Could you say this passage about it?
Let it challenge you over your viewing. For something a little further, you may decide it to be a good idea to print out the scripture in large print and put it near your TV as a reminder of this challenge.