A contemplative practice is any act, habitually entered into with your whole heart, as a way of awakening, deepening, and sustaining a contemplative experience of the inherent holiness of the present moment. The critical factor is not so much what the practice is in its externals as the extent to which the practice incarnates an utterly sincere stance of awakening and surrendering to the Godly nature of the present moment.
We don't talk much about humility in AA, almost never use the word. Maybe that is because, as the spiritual adage has it, if you think you are humble, you are not. But I see enough of freedom, serenity, healing, and unselfishness around me to think it must be hiding there somewhere.