Spreading your resources

I like what Victoria Woods said in one TV show,

... I can't worry over everything, you know.

We have environmental problems, poverty, humanity issues and natural disasters amongst many other problems, then each of those problems have so many related problems. I figure if each of us were to look at everything, we would lack the resources needed to seriously consider and contribute to any one specific aspect.

Each of us can't worry over everything, you know. That's why there are over 6 billion people on Earth.

You may have many concerns, but what is the one or two main things you feel that you should concentrate on? Are you spreading your resources too thin?