From 31 laws of fun:
Timothy Ferris: "What is the opposite of happiness? Sadness? No. Just as love and hate are two sides of the same coin, so are happiness and sadness... The opposite of love is indifference, and the opposite of happiness is - here's the clincher - boredom... The question you should be asking isn't 'What do I want?' or 'What are my goals?' but 'What would excite me?'... Living like a millionaire requires doing interesting things and not just owning enviable things."