How to astral travel,astral projection,out of body experience?

That's a risky proposition if you don't know how to control it...too easy to get lost. I wouldn't be too concerned about possession or coming to physical harm; there are ways to protect yourself from that sort of deal. It's all in the connection...literally. There are other, more pressing dangers to doing it deliberately. What do you want to travel for? Simple exploration and curiosity, or is there more to it? Is this a simple desire or a need? First thing: shielding. I'd be more concerned about the possible harm that could come to your mind and/or soul while traveling than the body, but if you're worried about possession, it's the easiest way to prevent that as well. I will say, however, that possession is nowhere near as common as people seem to think; most malevolent spirits aren't drawn to empty bodies, but to strong power. If you have some modicum of natural ability, the threat is greater...but in most cases it's minimal. But still...read books on psychic attack and protection. Learn how to defend yourself if something happens. Second step: preparation. Research the act itself. For instance, how do you know that you haven't astral traveled before? You might do it on a regular basis and not know it. Find out what you need to know. And take steps to make sure that you can find your way back if you venture. That's by far the greatest danger...losing track of the body. Astral travel can take you to many places, and not all of them are friendly. Be careful; don't take this lightly or treat it like a game, or the price may be high.

here's a complete guide http://www.spiritual.com.au/astral.html

Scott Cunningham books have a lot of information on Astral Travel which you can find at your local chain bookstore and witchvox.com is a great resouce too.

Some sites...