Neck function is affected by your shoulder function. How you carry your shoulders influences neck pain, posture and motion.
Try rolling your shoulders forwards and backwards, stretching slowly, to help ease tension at the neck.
Exercises such as fast paced walking are important for your neck too. Walking is one of the least stressful exercises to your body and is something you can keep up well into your later years.
Finally, make sure your neck posture is kept upright when you are talking on the phone, driving, reading, doing other tasks, or sleeping. Neck support pillows are available to help maintain the normal forward arch of the neck. An excellent one is the Mediflow Waterbase Pillow. It provides gentle, responsive support all night long and helps to reduce the intensity of neck pain.