My daughter was watching an episode of the Brady Bunch the other day, where Greg was working on an old clunker automobile he bought, and had the family come out to look at it when he was finished: he had this huge pile of garbage left over from working on the engine, all spleefed out over the driveway in front of the car. He said, "Oh, I don't need that stuff." I laugh every time...
Someone else here has a good sig, something to the effect that experience is directly proportional to the amount of stuff ruined