Meditation is now pretty much understood as a poor man's drug experience isn't it? You can use it to get similar but less profound effects much more slowly - albeit more cheaply.
You do need to consider the health effects though of course. I've known a few people who have found meditation extremely stressful and quite damaging to their mental state. Ultimately it may be better to play it safe and actually spend the money to get properly fucked up instead of doing the cheapskate version - your mental world is too important to skimp on and cutting corners by using the old-fashiobed (obsolete?) method is ultimately a false economy.
Sure, when it was the only option it made sense, but, in the thousands of years since the invention of meditation we have, as you might expect, made a huge number of improvements which are too good to ignore.
That said, you do need to be a bit careful with valium; I don't know how addictive it is - ie how much and how often you need to take it to get hooked - but I do know that once you are addicted it's an absolute motherfucker to come off, the problem being that, unlike with heroin, a valium withdrawal can kill you (as can alcohol withdrawal and, some sources suggest, opium withdrawn).
