Have you ever tried or considered meditation? Vipassana meditation specifically focuses on quieting the mind while retaining full awareness, so as to untangle ourselves from our thoughts and gain transcendence to reality. I can't personally speak for the results (I just started with it myself, like, yesterday... if nothing else, it's incredibly relaxing) but the fact that it's been around for thousands of years has to give it some credibility.

Check out the link a few posts down in this thread:
http://boards.cannabis.com/spiritual...editation.html