Don't pollute your mind
There is a saying 'You are what you eat'. This is also true with your spiritual health. Be selective with what you feed your mind. What you watch, read and hear feeds your soul. It influences your thoughts, feelings, behaviour and mindset. So make a conscious choice about what you will allow to shape you.
"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." Phil 4:8 (NIV)