The Strangest Products And My Results With Them Super Power Memory By Harry Lorayne 
Now, over a year ago, I remember quickly skimming the book during lunchtime, and followed one of the techniques for remembering long lists of things, like words.
It took about 10 minutes, a the book had a sample lists of words to memorize, no writing it down or even rehearsing it.
I still remember that list over a year later without writing it down or straining!
Of course, little point in actually re posting the lists, since I could easily recheck what I wrote before, but this is honestly how I remember them;
Carpet, Paper, Bottle, Bed, Fish, Chair, Window, Telephone, Cigarette, Nail, Shoe, Microphone
Perhaps I got one or two out order, since I haven't checked it since I memorized it.
I still remember the list, and even today I use the technique to "store" information I want to remember, though I tend to do it infrequently.
Bio Circuits - Quickly Relax and Actually Feel Your "Aura" With These? 
With these, it is claimed, that you can actually feel your bio energy or aura circulating through your body, like an electrical current, and that this causes a very deep state of relaxation.
I own a pair, and was actually surprised-I did feel the effects.
The first few times I tried it, I sensed what felt like small, electrical vibrations flowing throughout the body, in waves, on and off until they finally stopped.
And at other times, I would nearly black out while lying in them.
And at other times, if I laid in them for too long, I would experience a reverse effect, of being overstimulated, as I drank too much caffeine.
This is exactly what the pamphlet and other users described.
It is claimed that there was an experiment where they had a number of subjects connected to bio circuits; one was a placebo, another incorrectly configured, and the other was real. All of the subjects were said to correctly identified the real bio circuit.
However, I have no idea if the aura actually exists, but I do recall feeling something.
Attention Cd- Listen To This, Improve Concentration Immediately 
I have had this one for a while too.
I recall playing this CD while playing checkers and winning 5 games straight.
But other thing that I have also noticed is that at times when I played it for over an hour, I felt very jittery, as if I drank a lot of coffee.
The CD instruction book explained that the sounds have an affect on the brainwaves involving concentration.
It doesn't happen all the time, but there have been moments when I think the CD had an affect on my attention.
One day, I was listening to it while driving to work around 11:50 am, I noticed that some cars had their headlights on, though the sun was out and shining and in the middle of the sky.
It didn't seem to unusual to notice, except that it was during the day, when the sun was completely out, and I never paid much attention to that before.
Brainwave Entrainment Ultra meditation - Meditate Like A Monk In 20 Minutes? 
I'm basically skeptical of the whole "meditate like a monk in 20 minutes". I think there is too much exaggeration that leads to a lot of disappointment.
However, I like using this CD because I feel it does drive the brainwaves into a deep theta/delta state, but I think there is a catch.
You have to do about 60% of the work, or at least, I know I do. To get the experiences or results when listening, you have to be ready to stay awake, and then focus your mind to whatever reason you're listening in the first place.
I practiced listening to the Delta Brainwave over time until I can listen for hours and remain awake.
Sometimes, I have had odd experiences like nearly dosing off while listening and through closed eyes, seeing the white wall that was front of my car.
I think one key is to learn to stay awake while listening, or otherwise you might just fall asleep and lose awareness.
Although I find the entrainment Cds useful, I tend to discard the other claims from the company.