Here is a simple restorative pose that will help you melt away your sub-occipital tension in less than 10 minutes. Take a break from your screen, do wonders for your posture, and give it a try.
Set up two blocks and two blankets as shown in the picture below. Using foam blocks are best. If you have cork or wooden blocks, just place a small towel over the top edge to make a more comfortable support. Lay down along the support and place the top edge of the block at the base of the skull where the attachment of the sub-occipitals lie (see the red line). You can be somewhat intuitive about the location as there often is a deep sense of well-being when you land in the right spot; just ensure that your chin stays aligned and perpendicular to the floor so the cervical spine maintains its natural curve. The common misalignment here is allowing the head to fall back too far placing the neck in hyperextension.
Breathe deep & let go.
Liz Heffernan, E-RYT 500
C-IAYT Yoga Therapist