President Boyd K. Packer, President of the Quorum of the Twelve Apostles, shares some of his thoughts on this subject.
How can I keep away from the bad things in the world?04265_000_021
You are a child of God. … Fix that truth in your mind and hold to it.
You know right from wrong. Learn to pay attention to that spiritual voice of warning within you.
Take nothing into your body which may harm it.
[Have] the courage to run away from unworthy things [even] when you will be mocked for doing so.
Illustration by Don Seegmiller