A day without laughter is a day wasted.

I hate that stupid old pickup truck
You never let me drive.
You're a redneck heartbreak
Who's really bad at lying.
So watch me strike a match
On all my wasted time.
As far as I'm concerned you're
Just another picture to burn.

The man who views the world at 50 the same as he did at 20 has wasted 30 years of his life.