Can one hypnotise oneself?

Yes, but why would you want to do it? Experiment? Recreation? Fun? Please, don't do that. Hypnosis belongs in the domain of those who are well schooled in application of this modality of therapy. Library; cookbook self hypnosis is a joke at best and potentially harmful in that if you are successful, (lol) you may make the problem you are dealing with worse, due to lack of experience with this procedure. First of all, not everybody is a good subject. Most people can be under the right cirstances, (sleep deprivation, comfort, lighting, etc.). Let's get back to why you want to do it. Good reasons for teaching self hypnosis are.....smoking cessation, appetite control, pain management, phobia therapy, performance anxiety just to name a few. The first thing I would do is have one or two hypnosis inductions to determine the level or depth of trance necessary to achieve optimal susceptibility to suggestion for that individual. Then, I would prepare an audio for induction, suggestion through arousal. After the subject has become proficient with this on their own, they are ready to be taught true self hypnosis. Does this shed some light on the proper practice of self hypnosis?