Apart from taking short breaks every one or two hours, an effective way to reduce the discomfort is to perform these easy stretch yoga asanas (poses). Neck ... on a chair and roll your shoulder ...

This is Yoga for Neck and Shoulders ... Feeling your spine balancing over the hips. Gently roll the shoulders back, and lengthen the neck, bringing your awareness to your neck and shoulders.

Point your tailbone directly down at the chair, balancing on your ischial tuberosities. Stack your shoulders over your hips and suspend your head and neck over the center of your pelvis.