there is alot of info here on the site, on how to do it, basically reading up on it helps alot in getting ready for it, watching vids on it as well it all prime/prep you for it, but stay away from the negative post/vids about it they will only instill fear, and projecting isn't anything to be fearful of, alot of us do it and you see we return ok, but it will change your outlook on life for the good.....after checking they don't have lots of info about how to do it just a lot of experiences so i will link you to the site that has lots of info, this is the my primary site i go to daily.
www.astralvoid.com