We would love to know the author of this piece to give it proper credit. Our niece shared it several years ago. It is the second meditation that lives on my computer, waiting to be read daily.
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 special 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 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 time to the improvement 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.

This is a great article, I had read it but it was good to refresh it. Thanks, Chirag.