there is multiple scientific evidence that the life changing 'healing' power of prayer--whether it be emotional or physical--is nothing more than the healing power of meditation. When people meditate, their body and minds start to react differently and do weird stuff. It's scientific, not religious.
So religion/prayer is just a template people use to tap into this natural ability. I suggest meditation and drop the spiritual hocus pocus. It's not necessary and you'll just be living a lie. But if you really do need the hocus pocus because you are unable to survive without the clutch...then go for it. It's a free world.
I admire the positive potential religion has in bringing people together in a local community. Though it could also get negative, as in Middle East negative.
Some people disagree with you. And I agree with them:
http://www.nytimes.com/2006/03/31/health/31pray.html?_r=1