Life.

By deciding to have inner peace and happiness and to view your daily experiences (even the unpleasant ones) as learning opportunities or character building opportunities. You could have all of the riches in the world, but not be happy. You could only have 1 cent to your name but be so content with yourself and your abilities that it doesn't matter. It's all in your perception and how you allow outside stimuli to affect you.

If you tell yourself that you are joyful, hopeful and happy with so many of life's possibilities ahead of you, so shall you be. If you tell yourself that you are unhappy with a hopeless life, then so you shall be.

Relax and enjoy life. Don't sweat the small stuff. Stress is the worst thing for your overall health.
Do a job that you enjoy. Be a happy person and others around you will feel that happiness. Be the best you can be in all endeavors. Read Rhonda Byrne's "The Secret".