Lastly, consider that when our core muscles — specifically, here, our back muscles — are strong, that they help keep our shoulders down.
In other words, a strong back body helps prevent us from hiking up and hunching through the shoulders, without even thinking about it during the day. Because of this, I practice back-strengthening exercises daily.
Begin this Locust Pose variation commonly called "Superman" by lying on your stomach. Take your feet mat-width distance apart and bring your forehead to the floor.
Draw your arms forward and wide so that your entire body is in an "X" shape.
Then, exhale all the air out of your lungs and lift everything up as high as you can on an inhale. Remembering to breathe, squeeze your legs and arms together, then extend your body back out into a lifted "X" shape.
Lower and repeat 8 to 10 times.