You can focus on a chair, as in going into detail about how it feels when you sit on it and how cool the design looks and how firmly it sits on the floor, etc, and then go on to focus on a table, for example, with the same attention to detail.
You can't focus on both, in detail, at the same time.
This applies to your life as well.
You can't focus on the negatives and still focus on the positives of your life at the same time.
It's either you focus on one or the other.
It's just that most of the shows you watch or hear on the radio focus on the negatives.
Even all forms of advertising and the news (bad news sells) even the people you hang out with give the impression that it is mostly bad in the world.
So you perceive the world as a negative place to live in.
You then will react to it negatively.
Your negative reAction will produce negative results.
Which will give you a perception that the world is a negative place to live in.
And so your cycle continues.
Contrary to what you might believe, Life always aims to maintain a state of balance, it's never All Good, nor it is always All Bad.
It maintains that state of balance in the form of the changing of the seasons, because, as you know, it's not all Winter all year round.
But with dumping so much junk in the form of the negative news you might hear and watch, the negative facebook status updates flooding your timeline and the negative minded people you might be following on twitter, your mind begins to absorb all this negativity and forms the perception that we are living in an awful world that's going to end by 12/12/2012.
Because you are focusing on "the chairs" of Life.
Commit to getting into the habit of acknowledging the negative but choosing to focus on the positive more.
And since that is your focus then that will be where your attention lies, and you will base all your actions from a positive (optimistic) bias, which will produce positive results for you.
"Energy flows where attention goes."