To improve your mood...
…check your posture while you’re sitting. Slouching can not only lead to back and shoulder pain, but because hunched posture is associated with being drained and bummed out, it can start making you feel that way. But the opposite is also true. The Journal of Behavior Therapy and Experimental Psychiatry found that people who sat up straight, spine in line and shoulders back, felt more enthusiastic and less fatigued, and it even boosted their brain activity.