blessed is the one who does not walk in step with the wicked or stand in the way that sinners take or sit in the company of mockers.
What you are focussed on doesn’t only dominate your attention, it also affects the direction that you take and, ultimately, your destination. In Psalm 1 we see that focus on the Word of God actually leads to being established and fruitful (like a tree). In contrast, a lack of focus on the Word of God leads to a declining forward momentum from “walking” to “standing” to eventually “sitting” and being blown away like “chaff”.
Meditating on scripture is the key! Not just giving it a passing glance, but actually pondering it reflectively and looking for ways to apply it to our lives.