You can find alot of stuff on google and bing.

Try this link for starters: http://www.thc-ministry.net/marijuana-religion.htm...

Although marijuana can be useful, it should not become a crutch that prevents the practititoner from accessing higher consciousness through genuine training in concentration. Timothy Leary explained that the saying "get high" refers to moving from the terrestrial brain functions into the extraterrestrial functions. Nonethless, the use of hallucinogens and psychadelics, although very useful, should never replace steadfast training in meditation. When you make progress in concentration, the mind does not experience the same effects upon injesting external substances. There are, for example, stories about certain Hindu and Buddhist yogis being given huge doses of lsd and them replying to their supplier that they don't understand what the drug is supposed to do - it didn't change their consciousness from the space they're already in all the time, aware of the subtle energy matrix and so on. They didn't arrive at such stability through excessive dependence upon external agents. Their attainments are different from the temporary insight of a vision quest induced by marijuana or psylocybin. Their attainments come from consistent training in tranquil abiding and other methods for accomplishing stability in higher consciousness.

There are several reasons for vows not to take intoxicants. Intoxicants pollute the body and in so doing contribute to the degeneration of longevity. Intoxicants can also lead to negative actions that make obstacles for the practitioner. Finally, by vowing not to take intoxicants, the practitioner purifies the negative karma they created in the past when influenced by intoxicants.

That being said, every practitioner is free to train as they decide. Taking a vow is not the only method to purify negative karma. Also, the use of intoxicants can be very useful when moderated and used in specific settings with specific inner trainings established. In India and Tibet, the Mahasiddhas included alcohol and other substances into their tsok feasts to increase great bliss and assist their training. However, this should not be an excuse to take intoxicants all the time.

Ultimately, nothing can replace the stability gained through training the mind alone. As you progress, you will find that intoxicants don't alter your perception as they used to. You will find that the inner experience gained through concentration is so satifying and insightful that the desire or need for intoxicants fades away.

I figure may as well add the other methods for inducing trance. Sensory deprivation and samadhi tanks. Sleep deprivation. Spinning such as done by whirling dervish. Seathing such as done in Rune Magic. The Death Posture as utilised in Chaos Magic. Intonation of various mantras or runes and so forth.

All of these things induce a higher state of awareness. But again, just getting there - for a Buddhist - is not the main point, but stabilizing our consciousness in that space is. That is why I've put emphasis on the latter here.