You might also find these gentlemen interesting:http://en.wikipedia.org/wiki/Charles_Tarthttp://en.wikipedia.org/wiki/Carlos_Castanedahttp://en.wikipedia.org/wiki/Stephen_LaBerge
Having lost so many of my high school friends & acquaintences to drugs, I have some issues with the psychedelics of McKenna, even of Castaneda and the like, though I try not to judge harshly since altering my own consciousness comes naturally easily for me, being born a lucid dreamer, being practiced in dream yoga and studied in Dzogchen. I believe that with proper mental exercises, anyone can reach the areas of their mind which are so naturally accessible to those of us born to it, and though I am purposely not in the habit of actively interfering with the lives of others, a friend who was interested did have success in waking her mind in her sleep after we worked on that together. Also I have read from others who have accomplished this mostly on their own, perhaps with the help of published information by others.
Once you see where your mind can take you, you can take your mind even further. Thus altering consciousness comes as naturally to us as children spinning themselves dizzy.
Exploring & expanding consciousness, knowing the self, for me, is the most important thing a person can do with their life (with helping others coinciding or at least taking a close 2nd), but for every benefit there is a price, particularly regarding material success in a world built on deception & greed, but also, even just practically speaking in terms of how the self functions in the word, for while reaching for enlightenment makes for a most satisfying life (insert Socrates' "the unexamined life"), I suspect living it completely would ultimately make for an impossible life because you still need to be able to function in society which you can not do unless you adhere somewhat to it. So while you are reclaiming your mind, don't neglect to enjoy & partake in the world you are in.
I would warn the OP that especially at your impressionable age--at any age, really--unless you are disciplined, you could fall into a trap of escapism in attempting to "reclaim your mind". So while exploring the edges, remember to seek balance.