For God hath not given us the spirit of fear; but of power, and of love, and of a sound mind. 2 Timothy 1:7(KJV)
It is very important to think about what we think about. If you have nothing or very little to do, you might tend to start letting your mind wander into areas it has no business. Just as the words we say are crucial, so are our thought patterns. These both are areas Satan would love to torment you with. Don't even allow yourself to go there.
To have a sound mind you have to be intentional in what you think or dwell on. This requires your mind be fed a good 'diet' of purity, peace, wholesomeness, and love. The worse place to find these things is on television and the best place is the word of God.
Maybe you have heard the phrase "garbage in, garbage out" referring to the mind. Images and thoughts can get in there which can only lead to your downfall. Don't allow that to happen. Turn off bad news, violent shows and movies, hearing cursing and replace it with a dose or two of God's word. Start by reading John chapter 1. Be blessed.
PRAYER: I am very thankful that I have a way to keep my mind focused and that is to feed it from the Bible. Give me discipline to get things out of my life that keep my mind in turmoil. In Jesus' name. Amen.