With the practice of concentration meditation we work with a very simple recurring experience, called a ‘meditation object.’ Standard objects of meditation include things like the breath, sound, the body, a simple phrase, or even a visualization. Regardless of which object we select, the practice of concentration involves a very simple feedback loop. In the first step of this feedback loop we direct our attention to the meditation object and connect with the direct sensory experience of it. We then sustain our attention there for as long as we’re able. At some point, often quite quickly, our attention will wander off to something else. This ‘mind wandering’ is not a problem, but rather prompts the next point in the loop, which is to notice that we’ve wandered and then re-direct our attention back to the object. From there the loop continues, direct, sustain, wander, notice, and re-direct. It’s an extremely simple practice, but can be quite difficult to master. This is why it’s called a practice.