"Enthusiasm

makes the difference" 

-Norman Peale

Being enthusiastic makes a huge impact in your life and in others as well. If someone near you is sad and you are extremely cheerful and happy maybe they wont be sad anymore because they saw you being cheerful and they liked that. You need to be enthusiastic rather than sad. There is absolutely no time to waste in life to be sad over dumb unimportant things. Life is too short for that. Why are you going to be crying and wasting your time over non sense. Be joyful. Nothing good will ever come from being upset. Good things will happen to those who do the right thing and are happy.