You should already know by now that the major cause of neck pain is you. If you do not then i suggest you read the links at the bottom of the page. However, a great adjunct to reinforcing your posture is to join an alexander technique class. This will help you learn better body mechanics so that your posture becomes more ingrained into your psyche.
We teach this at our spa and people absolutely love it. If you slouch then YOU WILL CONTINUE TO HAVE PAIN.
Stretching- Here is one of the worst to do
Which exercises should you do for a pinched nerve
The 13 most important things to do to have a pain free neck
Stretching- Here is one of the worst to do
Which exercises should you do for a pinched nerve
The stretch you should not do for Neck and Shoulder pain
The Best pillows-What the Studies Say
About Me
Mark Perren-Jones has worked throughout the world’s health spas and health clinics. He did the majority of his study (7 years) in Australia and has treated thousands of clients over the past 20 years with all sorts of neck and back problems. He has studied acupuncture, massage, joint manipulation and mobilization, kinesiology, reflexology, Thai massage, Bowen technique and many other modalities to understand which therapies gets the best therapeutic results and which don’t for particular neck and back problems.
With his 20 years of clinical experience, years of diligent study and research Mark has put together this site so that you can benefit directly from his work. You will be taught not only how to treat your own pain but as importantly what causes your pain in the first place. With the knowledge you gain to remove the causes of your neck and back pain, means you will not have to suffer anymore. 
I have my new DVD out now which will show you in my easy 3 step approach how to alleviate your own neck pain.
Neck pain and especially stiff necks are not difficult to treat once you know how ( ie.remove the major causes of your neck pain and stiffness.)
I will show you how simple it is to treat your neck pain & stiffness both quickly and easily.