ALways be optimistic. But don't be as optimistic as a dog. A dog will eat its own vomit with the expectation that it will just work out better the second time around. You know what? Don't be optimistic. It doesn't work.
Don't listen to what some people say, everyone is an optimist. Everyone is being completely optimistic - they might as well embrace the reality. Whenever I turn on the television I stare at it for eight minutes, turn it off and then have to go lie down because civilisation is clearly coming to a sticky end. But then I'm up 15 minutes later because Fox News must not win. See? Optimism. In other news, I should be a motivational speaker.