Start with mastering void meditation. Once you've done that work on reaching a trance. Once you've reached a trance try to master it and become proficient at both stilling your mind and reaching a trance state. Once you reach this level astral projecting will become easier and easier with time. That's the most practical approach I can think of. Just know that it will require patience and practice. Don't give up and keep going at it, try and try again... Eventually you will unleash this ability within yourself.
The following are all helpful sources for this endeavor... http://www.angelfire.com/empire/serpent ... ation.html
