You're either viewing the glass as half empty or half full. You're either getting better or getting worse. We tend to lean towards the grey area, but some things are meant to be black and white.
I have found that I am much happier when I view my world from a positive place. I try to see the best in people, opposed to thinking negatively. And I tend to wonder, what's the best thing that can happen, instead of thinking of the worst case scenario. I believe that these practices help me send and receive positive vibes.