Dispelling the myths
Firstly it is important to dispel some of the myths surrounding hypnosis. Essentially it is time when your thought patterns shift from the conscious, analytical, here and now way of thinking to a pattern of more relaxed, day-dream like wandering of thoughts. This actually happens naturally many times a day - such as when we are driving, reading, focusing, day dreaming etc.
Therefore hypnosis is a state of mind that is totally natural and familiar to everyone. During this time you become more receptive to positive suggestions and thought patterns as your thoughts are less constrained by your analytical, critical way of thinking (your conscious mind).
Technically it is a time when we have a greater degree of control over our thoughts and an increased ability to access the part of our mind which stores all out thoughts, fears, memories, patterns as well as physical functions (known collectively as the subconscious) quite often the reason that good ideas can come to you spontaneously when you are relaxing in the bath, driving, going to sleep!
Normally we dip in and out of this state many times a day, however, with guidance and practice you can actively take yourself into this state as a means to achieving desirable changes both emotionally and physically. Without the usual constraints and limitations of your conscious mind these changes can take place more easily and more quickly than other approaches.