Sandra Donaoldson has a nice overview on Mind Body Medicine . . . a general introduction to some of the forms (missing a number that are becoming more known at the moment), albeit some of the generalizations miss the major divisions in approach . . . for instance, hypnosis is NOT just about suggestive therapy and there is much more to guided imagery than imagination. Most focused trance guides will use a wide variety of these techniques in a method.

In any case, a fair introduction for those unfamiliar with the modality.