Clearly focus on what really matters

As time goes by and life continues to unfold on front of our eyes, a fairly large spectrum of situations emphasizing the 'art of living' are occurring...from small and trivial to big and significant...some of those inspire us, while others make us more vigilant or attentive, but all together (if we choose to pay attention and care) help each of us distinguish and objectively prioritize the most important matters in our personal, professional or social lives.
To further emphasize the point I intend to make, below I'm sharing with you a very popular story, which I'm sure most of you already know, but worth reviewing. Enjoy it!

Story: "The jar of life - rocks, pebbles and sand"
A philosophy professor once stood before his class with a large empty jar. He filled the jar with large rocks and then asked his students if the jar was full. 
He then added small pebbles to the jar and asked again, "Is this jar full now?"
The students agreed that the jar was indeed full. 
 The professor then poured sand into the jar and asked them again if the jar was full.
The students agreed that the jar was finally full.
The professor went on to explain that the jar signifies one's life.
The rocks are equivalent to the most important things in your life, such as family, health and relationships. If the pebbles and the sand were lost, the jar would still be full and your life would still have meaning.
The pebbles represent the other things that matter in your life, such as your work, school and house. These things often come and go, and are not permanent or essential to your overall well-being. And finally, the sand represents the remaining small stuff and material possessions in your life. These things don't mean much to your life as a whole and are likely only done to waste time or get small tasks accomplished.
The metaphor here is that if you start with putting sand into the jar, you will not have room for rocks or pebbles. This holds true for the things you let into your life too.

Moral:
Things and people come into your life for a reason, a season, or a lifetime, and when you figure out which it is then you will know exactly what to do.
Aside of that, it helps to be reminded that only when you let go of what doesn't bring you joy any longer, you could create space for better things to enter into  your life. 
Elders often used to say that it is important to do well for yourself without harming others, but also equally important it is to make sure you help others without harming yourself. 
To be happy you must let go completely of what's gone, be grateful for what remains and with lucid positivity look forward to what is coming next.

High performance in life always begins with clarity.