Things that helped me: Get a sit/stand desk and vary your posture and shoulder/elbow angles over the course of the work day. Exercise your hands, arms, and up

Things that helped me: Get a sit/stand desk and vary your posture and shoulder/elbow angles over the course of the work day. Exercise your hands, arms, and upper back. Lift weights, do indoor rock climbing, go for a swim, do some yoga. Ignore your smartphone as much as possible.