Psalm 119:9 - "How can a young person stay on the path of purity? By living according to your word."
It's that simple. Yes it's easier said than done but really the Word of God helps us in so many walks of life.
We must stay pure in our hearts, minds, and the things we intake through media, conversation and more. It's so hard out here but we need a filter. And the Bible can help us filter out what we need and what's not healthy for our souls.
I personally don't watch television. It's hard to find anything pure and family friendly to watch so I don't even bother. I've canceled out certain shows because I know it won't help me in my walk with Christ.
What extreme measures are you taking to make sure you're on the path to purity/ holiness? Remember, God is watching.