Hey Tom!
It's interesting cause when I first asked the question about pot I hadn't conceived of it (temporarily) actually having the capacity to improve concentration!
Nor had I thought of any way in particular to umm.. hmmm... tricky to find the right word here, but I would say, intentionally try to 'boost' my meditative state (other than trying to find a quiet place).
Maybe this is because I have read mostly about the Zen tradition where at most you'll find some serious tea drinking. Also, I read several of Brad Warner's books and judging from his writings, seems to have a pretty good handle on things (he's quite open about coming from a 'straight edge' punk rock background (no drugs and if possible no sex although he never got that one)). He pretty much says that if you're looking for meditative aids then you're probably looking for a short-cut which means that you are probably more prone to be doing something wrong (like get taken advantage of by Genpo Roshi in his Big Mind process).
That's Brad's opinion, personally I don't know enough to say anything about it really (but I will

). Except that I'm used to most things worth it take discipline, time and effort so I tend towards his opinion.
But I guess you could also argue that like the Middle Way, 4 Noble Truths etc. this is also another way of gaining insight. However, I ALWAYS get suspicious when people start using buzz words (I'm used to it being in an architecture related discipline) which sound nice but may be used to disguise the truth. For example, this idea of a spiritual technology where 'science' and 'spirituality' are combined to create a super amazing way to get enlightened fast without much effort.
So in short, Tom I'm just a little suspicious of something that markets itself as, "The lazy man's way to meditate..." I mean no one wants to hear that you'll have to climb several mountains, cross a few deserts, sail a few oceans and die a couple of times get reborn a few times and then maybe you Might attain enlightenment... (hehe who knows I probably did that like a million trillion times over). But that sounds like a little bit too much in the, 'wow it's super easy!'
But I haven't tried it so this is just my own gut instinct and opinions that I have read from other people!
By the way I think this is the first forum I've been to where most people have their real photo! (or maybe not, Just a thought) You look like a pretty happy chap!