The non-awareness set, a nice little concept taught by Igor Ledochowski, is a kind of induction that's quite unlike most things taught anywhere: it's sort of non-directive (though you can of course direct it more strongly than it is by default) and it sort of has a built-in "plausibility generator": it creates suggestions that are plausible to the subject (on the unconscious level), so they tend to work virtually always.
Igor posted a video about it here:
http://ultimatehypnotherapytraining.com/blog/igors-secret-hypnotic-...... for those with not enough time to watch it (it contains a lengthy demo and lots of small demos during the explanations, so you really should watch it to get an idea of how it works in practice, but of course I can't force you to watch it) and those who want a bit more information before they spend the time, I'll explain what happens in the NAS.
The NAS is, essentially, purified and systematic utilization. You take things that people do, either without conscious awareness or without conscious awareness of why they are doing it, and capitalize on them as signs of an altered state. For example: "hey, your finger just twitched. Do you always twitch your finger like that?" "Uh, no..." "Hmm. That's interesting. Normally you don't twitch your fingers, but now you did, and you didn't even know you were doing it... I wonder what it means..."
By itself, that suggestion could do anything, but if there is a surrounding frame of, say, trance... well, what do you think people will figure the twitching finger means?
The effects of the non-awareness set are wide-ranging: it tends to create a certain base level of confusion and uncertainty (excellent preconditions for change and learning) and, more importantly, it makes it really easy to establish a stable and powerful conscious-unconscious dissociation. By focusing people on all the things they do unconsciously and artfully implying that the mere presence of these things indicates an altered state, few people will default to rejecting everything you say.
Of course, presentation is key here. Ledochowski calls it H+: the firm and unwavering intent of the hypnotist to create a wonderful hypnotic experience for the client. He really goes to town about this in his demonstrations. Go watch the video to see what I mean (and feel free to skip the last minute or so in which he's trying to sell his DVD course which is currently off the market anyway).
I hope that if you have never heard of the NAS before, it will give you new and interesting ideas. Perhaps you are going to realize that some of the best hypnotists already use it, but in a less structured way. And I don't really think you have to religiously follow the structure, anyway, but it helps very much in getting familiar with the principles of the NAS.
I'm wary of going into it more fully than Igor does himself in that free video, but if any of you have questions, I'll try and answer them based on my experience, though I'll say up front that I've never used the formal structure of the NAS myself. I've only used the principles as part of other things I've done.