Starting today, regardless of what goes on around you, recognize that you and you alone make the decision as to what kind of day it will be. Focus on what's right with your life rather than on what's wrong. If you can't be optimistic about the future, at least be neutral, but never concede to a worrisome, pessimistic anticipation of doom and gloom.
Neither the optimist nor the pessimist knows the future, but let's be honest, the optimist lives a much happier life in the present than the pessimist, and this makes all the difference in the world.! You're in charge of your life, BE in charge!