What are the best ergonomics to help reduce neck pain while working at a desk?

There are several answers to this question, but my primary consideration would be to ensure each user maintains a neutral posture at the workstation.

after ensuring the furnishing is ergonomic,

working form the feet up, ensure chair is appropriately sized, to allow feet to be flat on the floor, while providing adequate support for at least two-thirds of the thighs.

the chair height in relation to the desk or working surface should support a neutral posture.

Arm rests should be positioned to allow for the shoulders to be free of strain while keying

entire back should be properly supported, Especially the lower back curvature.

Does user use bi-or veri- focals instead of plain reading glasses?

the use of bifocals often forces users to try to look through the magnifying part of the lens, and in most cases arrive at a comfortable position after the neck has benn thrown off neutral.

Top of monitor should be about eye level to allow for entire span of screen to be covered while the neck remains neutral.

Finally for every5-8 minutes of continuous keying a few seconds break should be observed,

while a3-5 minute exercise of different body parts should be undertaken every hour.