Mandrake I'm sure you have heard a song or maybe a smell that has immediately transported you back to some past memory. The song/smell is an anchor it has become associated in your mind with a particular event. That anchor was set by accident but it can be set on purpose, basically all you need to do is get a person into the state you want and then just as it is reaching it's most intense, you bang on a window ( not used in NLP but is in magic ) this may need to be repeated and once done simply firing ( repeating ) the anchor, which could be a word a touch or similar will return the person to the state.
So this is what you do, you ask a person, do you remember a time when you were totally confused, possibly you had too much to drink? Ok well remember how that felt? Then as they recall it, they will automatically go into that state and you set your anchor just as they are coming to the peak.
This is a very useful NLP technique used for example for Atheletes just before competing, they can fire an Anchor that puts them in the best possible State for competing. Of course this can be used for many other things, best State for performing or whatever. It's about controling your state rather than your state contorolling you.

Hope that may be of some help.