Ah, sadness. What an enemy.
Basically, I would try to listen to my favorite music and I would draw to calm myself down. My friends can easily notice when I am sad or upset because... I barely get upset. I always rock myself back and forth, soothing myself quietly. I also occasionally bring out the ice cream carton and eat from the carton. I would sometimes cry it all out and feel better later on.
Yea. I barely get sad so... eh.