Let's be honest and say that one thing is for sure. Whether you take life seriously or treat it as a game; we know that no-one gets out of it alive! I would suggest that somewhere in the middle is a good place to be. Take those things seriously that need to be taken so and try to lighten up over everything else. Look back over your life to date and try to see if you might have enjoyed certain bits of it more, if you had taken a more light hearted approach.