A person only needs to think about what didn't go wrong today to smile and say Thank God!
My family was blessed with a child this last week. One thing that always amazes me is how easily babies smile. They do it for no selfish reason at all and perhaps that is its true power. Their smiles instantly make every one seeing them forget all their worldly problems and smile back.
One of the greatest gifts you can give yourself and those around you is a smile.