Advice on injury prevention through stretching.
An established way to help prevent injuries is through exercise and stretching. Stretching correctly will increase flexibility and reduce risk of injuries caused by lesions of the connective tissues. Use the tips that suit your needs for the activities you do.
http://www.dir.ca.gov/dosh/dosh_publications/janitors.pdf page 17
http://www.wikihow.com/Stretch
http://www.innerbody.com/image/musfov.html
Examples of stretches designed to relieve tightness in the neck