If you give it away freely, you don't ever have to worry about the measurement. The world will reward you 10 times over. Think about your winning and losing words. Think about your mood and mood swings. If it's more than five minutes, something's wrong.
Many people slip into cynicism day by day.
They become bitter because of their jealousy or envy of other people or their own misfortune. List the lessons you can learn from those you have bitterness for and the results will turn your thinking toward your own success. Celebrate victory and defeat. In my early days of selling I would go to a department store and buy myself something every time I made a sale. When someone told me to celebrate victory and defeat, I started to buy myself something after I lost a sale, too.