Hi. 
I’ll probably sound like a stick in the mud here, but I’ll say it anyway. I’ve had a few friends really burn themselves out on drugs - one has difficulty even talking. Now, I know you don’t want to hear that, so let me put it another way… Before you go experimenting randomly, please do a little bit of reading on the 'net about the relative safety of different substances.
I mean, just look at what happened to President Bush… 
Anyway, PsiPog has a lot of articles on telepathy and such, along with lessons on how to do it. I’ve had a precognitive vision once - where my normal eyesight was completely replaced by the vision for a few seconds (that is to say, not just a vague feeling). Very powerful stuff, whatever it is.
I’ve also had at least one precognitive dream - and I’m pretty good at statistics, so I’d wager it wasn’t just a coincidence. I believe that Shared Dreaming does work… It’s more a matter of figuring it out.
I think that’s the stage we’re at - figuring it out. It seems to me that we’re like the early experimenters with electricity, flying our kites in the storm. Our instruments are crude, our methods are barbaric, and our friends are laughing - but we’ll be the ones who figure it out. 