Today most books about personal development will include some NLP techniques, although they may not be labelled as such.
One of the most profound ideas of NLP is that of "modelling" i.e if one person can do something, then it should be a possible to find out what they are doing and how, and replicate it.
The four legs of NLP or the principles of NLP as they are something known, help us to achieve this modelling process. The fundamentals of NLP are as follows.
Outcome - Know what you want.
Many people know what they "dont" want eg. "I dont want to be depressed" "I don't want to be in this job".
What you need to know is what do you want?
You tend to get what you focuss on so it is important to have a well formed outcome
Sensory Acuity - Notice what is happening to you and to others around you
This includes what you can see and hear in others and also becoming aware of what is going on inside you, eg what you can see, hear and feel internally.
Once you know where you want to go you need to be able to notice whether you are going there or not.
Sensory Acuity i the ability to notice the signs that you are going in the right direction.
Flexibility - become aware that you could do different things
This refers to "Behavioural Flexibility" once you know what you want and you cannotice what is happening around you, you can develop the ability to do somthing different in order to achieve different results. This can be different results, different behaviours, different habits, different thought patterns, different beliefs or different performance levels or skills.
Action - do something else, take action
You know what you want and have set your goal; you have noticed what is happening inside and around you and you knw what needs to change, so if what you are doing now isn't working, do somthing else and decide what action you need to take- Now!