And finally, never, never, never do this type of thing yourself or let anyone teach you how to do it. They are not the ones who can give you an objective critique of the situation. It's like asking a crack-head whether it would be okay for you to try a little hit. And yet, the idea of letting a strange being do the much more intimate act of possessing your body doesn't faze some folks. OK, enough on that issue.
Lets get back to psychic readers, and take a step up the accuracy scale.
There are psychics who are able to clairvoyantly consult your own emotional, mental and soul bodies and receive from them the answers to the questions you are asking. This level of reading is more accurate because, generally, your own bodies know you better than any other beings who may happen to be hanging around. This kind of reading is particularly useful for more mundane kinds of questions involving work, love, everyday life, etc. Your bodies can tell the psychic where they're headed, and what they feel is in their way of getting there. A step above this, accuracy-wise, are psychics and healers who read your aura or energy field.