Wastes of time

Thoughts while riding metro: What isn't a waste of time, really?
First, and easier are the items that ARE a waste of time
Television (I suppose with the exception of educational television)
Sports
Books by 'D for Dead' type authors

I'll have to think about it more. There's so much of life that we just do to pass the time, so much that isn't pointed towards one purpose. I think that it would be impossible to make progress towards that purpose every minute of every day, so then there are those gaps where the human being unwinds and recouperates and is ready for the next round.