I've taken enormous (read: irresponsible) quantities of psychotropics over the course of my life: psilocybin in particular, but I've had experiences with everything from pure LSD to exotic molecules without names. The intensity and resonance of those experiences are such that it's sometimes hard to reconcile with the small fraction of the population who have known them. It's an essential part, to me, of the human exp…
If you're thinking about it, please, do your homework. Thoroughly. As others have cautioned, drug use can catalyze psychosis, the permanent emergence of bipolar disorder, etc. Consider these risks as they relate to you in particular (your family history, etc) very carefully, and if you decide to go ahead, be sure you prepare with as much care, consideration and thoroughness as it deserves.
And if you do, I'd consider avoiding LSD unless you can guarantee its legitimacy and purity. Mescaline is readily producible from common cacti (San Pedro, et al), has a long history of safe use by e.g. native americans §, and will likely provide you with a more helpful experience. It's also much harder to take too much of than e.g. psilocybin or LSD, which are very easy to consume a psychiatrically dangerous dose of.
There is a wealth of information out there - some of it spurious, but much of it helpful. I would encourage wider use of psychedelics, but I strongly qualify this encouragement. Not everyone should try them: some people are irreparably damaged by their first trip, and I don't claim to be able to say why; nor will they reward being treated without the utmost respect.
That said, after almost a decade of abstinence from tripping, I discovered mescaline, and I intend to continue to use it up to a few times a year. Thus far I've found it to be an extremely rewarding and positive force in my life; I'm an atheist, but you could say it's my replacement for religion.
§ http://www.wired.com/medtech/health/news/2005/11/69477 - "Peyote won't rot your brain"