Pessimistic? I'll bet I can show you a bright side to anything you are pessimistic about.
What I can't do is change a pessimist into an optimist. If you're determined to see the dark side, anything I might suggest will be followed by your, "Yea, but..."
Most people, however, are not pessimists; they're just optimists mired down in a pessimistic culture.
If that's you, let me throw you a rope and help you out of the muck!