Let go of the assumption that the world is against you, or that you were born with a gray cloud over your head.
Look for the source of your pessimism.
Understand that the past does not equal the future.
See yourself as a cause, not an effect.
Accept pain, failure and disappointment as a part of life, not the entirety of it.
Be thankful.
Use positive affirmations.
Remember that life is short.
Be a balanced optimist.