I Need to Find the Good In Life.

Sometimes I get really depressed with the way the world is turning out. I cry a lot and ask God to help everyone.  I hear one little thing on the news and I am depressed for a while.  For example, a little boy of 2 years was thrown off a bridge in Hawaii and I just put my head down and cried.  I dont understand.  I really need to find the positive side of life.  THe only thing that I can think of is that my children are healthy and happy... we are doing okay.. But for how long? And should I feel guilty because we are okay and there are so many that are not? Drives me crazy.