On the front it has "The Optimist Creed" - something I'd never read before (written in 1912 by a Christian D. Larson, who appears to have been a leader in American New Thought and metaphysics - and also a Norwegian!) but something perhaps we all should.
As the print on the card is pretty small, I'll type it up here for you. Feel free to print out and stick on your fridge or something ...
The Optimist Creed
Promise yourself -
To be so strong that nothing can disturb your peace of mind.
To talk health, happiness and prosperity to every person you meet.
To make all your friends feel that there is something in them.
To look at the sunny side of everything and make your optimism come true.
To think only of the best, to work only for the best, and to expect only the best.
To be just as enthusiastic about the success of others as you are about your own.
To forget the mistakes of the past and press on to the greater achievements of the future.
To wear a cheerful countenance at all times and give every living creature you meet a smile.
To give so much of yourself that you have no time to criticize others.
To be too large for worry, too noble for anger, too strong for fear, and too happy to permit the presence of trouble.
Yeah. I think if you can swing all of that ... happy is about the only thing you can be.
It can't hurt.