PERCEPTIONS!

The way you perceive things changes the way you react to them. Understanding that life's a quite short journey helps keeping the excitement for it. Keeping in mind that the bad days are lessons gives you the ability to stay calm, grounded and most importantly to enjoy the process till the storm is gone.
You get a clear vision on how seasons change. From happiness to sadness, from cold to warm, from emotions to numbness and from gaining it all to loosing the whole shit. Understand what mentioned previously, helps going with the ups and downs smoothly, helps staying calm and relaxed when the days are just so grey and black cause you know for sure that better days are coming and that you'll be a better person then.