It seems to me that, while religion and spirituality go hand in hand, they are not the same thing.
Spirituality, in the broadest term, is the conscious recognition that things exist in this world. Whether you believe in a spiritual realm or whether you believe that the physical is all that exists, everyone has their own spirituality. Everyone understands that the world has many facets and that these facets work in a specific way.
Religion, then, is the practical application of this understanding. What do we do with this knowledge? What is the healthiest way to live, taking all of reality into consideration? What is the balance of discipline and relaxation that best allows a person to live to the fullest?
That is the real question. There are probably a few objectively right answers in there, but not nearly as many as people think.