Don't let the circumstances that are outside of your control allow you to feel bad. You are the master of your own emotions.
Smile when life gets hard, look around you, see the trees, the water, the sun and the moon, look at yourself and understand that it's all perfect.

Laugh about the constructs that humans are being so serious about. Understand that it's all a game, so start playing and level up, live up to a higher standard, broaden your horizon!