There is always a bright side. You choose what you want to focus on and where you want to put your energy. I'm reading a great book all about creativity right now and came across this quote by Duke Ellington. It really hit me.
Just think what you can accomplish if you put your energy on positive things. You could go and start that company, go and get that client that you've been wanting, or go and create that masterpiece. You can do anything. Like Duke Ellington said - I took the energy it took to pout and decided to write some blues.