Yesterday after reading an article somewhere, after 2 clicks I got on some page explaining binaural beats. I knew about it but for some reason, the first time I read about that I wasn't very interested.
How To Be Smarter – The Science of Binaural Beats and Intelligence - Self Improvement
I opened up the program in which I make my music and quickly programmed 2 synthesizers to generate a binaural beat for 7 Hz. After a few minutes I couldn't concentrate anymore on my reading and everything else I was doing at my computer. After another 5-10 minutes I was ♥♥♥♥♥♥♥ up

. I got into a sleep-like state and I felt almost exactly the same way I felt after smoking weed.
I have downloaded a trial of this program:
Neuro-Programmer Download
And I experimented a bit with it. I feel like a little boy that got his hands on a brand new toy

I'm very impressed by the sessions that also have visual content. There's some stuff that just ... I don't even know how to say it.. it drugs you!
I think it would be a perfect aid in meditation/visualization.