Back in high school, my art teacher took us into the gallery and taught a simple way to move into a controlled Alpha state. It was his way of teaching that the mind did not need drugs in order to be creative, surrealistic, or think in abstract ways. That drugs were, in fact, a crutch and a hobble to creativity.
That lesson has stuck with me for many a year. Our dear friend Randolph dug up an interesting article from the Boston Globe, on using mental techniques to overcome pain, create vivid visualizations, and quickly enter dream states. Hacking the brain, so to speak. Or at least reverse-engineering it.
Food for thought :)
Have a great day!