It's not the hours

Sometimes we get sucked into the hand of the clock. Doesn't that sound nice. That is, we worry about the hours passing and that's how we measure what we've done or not done. I remember when I was younger my sister would be assigned to read for say a half hour, and she'd spend it reading as slowly as she could. When I got on her case she'd explain that she had been working at it for a half hour, so she was finished. I always pulled this quote out, and she always ignored me.
There's no real reason you need to know that.

Just remember:

It’s not the hours you put in your work that counts,
it’s the work you put in the hours.
-Sam Ewing-