Zen is one of those practices that can't be described by what it is or by what it is not. Zen is actually useless in accomplishing anything. Yet, its practice has many 'benefits'....but to try and get those benefits you actually lose those benefits.
So, how do you not practice Zen? Practice it...but don't practice it with an end in mind. Just sit. Watch the breath. When the mind wanders return to breath. If you feel comfortable or uncomfortable, scattered or focused, happy or sad...just acknowledge these sensations and return to breath. Each day, each breath is different. Be with it as it is...no chasing after pleasant sensations or running from unpleasant. Be present...here and now....and watch. All is perfectly managed.
Hands palm to palm,