If you imagine the subconscious mind as a building with many floors, which represent the many levels of the subconscious, and you have a security guard stood outside the door of the building the security guard being the conscious mind, to get in to the building (subconscious mind) we need to distract the security guard (conscious mind)
So how can we distract the security guard (conscious mind), well if you look at the diagram above you will see that the security guard (conscious mind) deals with mathematics, so one way to distract the security guard (conscious mind) would be to, for example count backwards from lets say 100, this in some cases can be enough to distract the security guard (conscious mind), but we can do more to guarantee we get into the building (subconscious mind), as well as counting backwards we can focus on our own breathing and because breathing is dealt with by the Subconscious mind, we can consciously lull the subconscious into play.
When you listen to a hypnosis tape you will probably find these things, you will be asked to count backwards, listen to the voice on the tape and focus on your breathing, this cause the security guard (conscious mind) To shut down and thus the subconscious takes over, ok so why does it shut down, well the reason is this, If the conscious mind tries to do more than two things at once it cant cope, kind of overloads it, so it shuts down so we can get into building (subconscious mind) Next time you see a hypnotist or listen to a hypnosis tape notice the things that are said and done to get past the security guard (conscious mind).
Once we are in the building (subconscious mind) we can put in suggestions, find solutions to problems and much more, because we are in the building (subconscious mind) there is no logic or reason and suggestions are accepted, I often get asked "can we be made to do anything against our will"? well yes and no, it depends on how suggestible the subject is and if suggestions are constructed correctly it can be done, for obvious reasons I'm not going to tell you how this is done because there is no need to use it and I wouldn't want it to get into the wrong hands.
Using the diagram above you can find your own methods of using hypnosis, and how to get past the security guard (conscious mind).