Meditation is rather hip right now, but the kind of meditation I am speaking of is not emptying our minds, but rather filling them.
The Psalms speak of meditation, and in the New Testament we are exhorted to meditate on what is good and true and upright and beautiful. Think on these things.
We are thus commanded with good reason: it is good for us. It is good for our attitudes. It is how we keep a proper perspective and align our judgement.