Consider this research from Perspectives on Psychological Science that urges caution against the mindfulness and meditation of recent years. And do take note, their subject matter is (not surprisingly) entirely generic &/or non-Christian. Here’s a salient quote: “As mindfulness has increasingly pervaded every aspect of contemporary society, so have misunderstandings about what it is, whom it helps, and how it affects the mind and brain. At a practical level, the misinformation and propagation of poor research methodology can potentially lead to people being harmed, cheated, disappointed, and/or disaffected.”
What you meditate upon and are mindful of really are of the utmost importance. The world and the enemy of your soul would prefer that you adopt generic &/or non-Christian practices having to do with your mind/soul and believe it really doesn’t matter. However, the pattern of Scripture is exclusively focused on God and His Word. (Psalms 1:2; 27:4; 63:6; Romans 8:6; Colossians 3:2) The inner man (heart/mind/soul) is the domain and purview of God. (Matthew 9:4; Luke 16:15; Acts 1:24; 15:8;Romans 8:27;1 Corinthians 2:11; Revelation 2:23) As Christians, we dare not be careless in such matters. Frankly, this all goes hand-in-hand with our prayer life — our conversation with God — about which so much more can be said.