Thoughts - Emotions - Behaviours
What should we be choosing to think about then.
Finally, brothers and sisters, 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. Philippians 4:8
Whatever is true - let us not get consumed by what we think others are thinking or doing, let us not believe those lies we hear about ourselves in our minds - the Truth is what God says about us, what Jesus did for us on the cross and who we are because of this.
We are adopted into The Kingdom of God, we are chosen, He has a plan for us, we are loved, we are fearfully and wonderfully made and all the other promise which He has declared over us.
Write them down, meditate on them, cherish them and BELIEVE them. Meditating is not a new thing, this is when God's people would sit and listen to Him, look into creation and allow nature to declare His greatness, pondering on His awesomeness and amazing ways. By getting our minds to stop wondering, oh what a challenge, to allow ourselves to ponder something that is true and not let our thoughts wonder and overtake, to just focus on and think about His truth. Allow this to percolate - like with coffee that percolates, let it get richer, let is let it get stronger and stronger as we percolate it in our souls. I believe that in this percolating these truths are able to settle in our hearts and are remembered when needed to fight the lies and to encourage others.
And that's just looking at "whatever is true.... think about such things".