My main issue with the New Age movement is its insistence on taking the ancient wisdom found in most major religions and trying to act like it is something "new." Instead of "bodhisattvas," "sidhas," "prophets," or "disciples," we now have Indigo Children and Astral Travelers. Different names for the same spiritual beings, yet devoid of the centuries of authority from real prophets, real sidhas, and real Buddhas.
Despite its insistence on being "philosophical" and "scientific," the ideas discussed in most New Age books don't even scratch the surface of the philosophical principles of Greek dialogues, Buddhist tantras or the Christian Bible, and let's not even start on "scientific evidence." There is an entire history of philosophy and theory from all around the world that has been incorrectly jotted down by a few half-educated people and shoved in front of the public eye. These people now want to tell us that if we visualize something, it will happen. The Secret to life is that there is no Big Secret. Truth is everywhere, as is God. Crack open any text from any established religion and you'll begin to see it. Except that maybe you're not really looking for God. Maybe you're looking for any explanation other than God.
It seems like anyone can write a self-help manual, stick some meditation and chakra aligning techniques in it, talk about spirit guides, and suddenly have a right to speak for God. Well here's what I've learned in my tiny insignificant life -- God's laws don't change just because we change our theories. You want to know the truth in the world? Do what the Buddha and Christ both said -- be good. Goodness brings us to a unity with God. Anything else is an unnecessary distraction. Serve each other. That is the true spiritual path.