What is on your mind? If you are spending time thinking about the negativity, evil, and wrong doings then you need to stop! God tells us in Philippians what we should be thinking about! People spend too much time thinking about what is wrong instead of thinking about all that's right!
Philippians 4:8 KJV
Finally, brethren, whatsoever things are true, whatsoever things are honest, whatsoever things are just, whatsoever things are pure, whatsoever things are lovely, whatsoever things are of good report; if there be any virtue, and if there be any praise, think on these things.