An interesting blog:
Hard Work's Overrated, Maybe Detrimental. | Design & Innovation | Fast Company

Founders of Flickr talk about working really hard like a chicken with it's head cut off instead of working smart, seeing what really needs work instead of wasting time on things that don't matter or won't make an impact. How you miss opportunity and your creativity has no room to wander when you work with your head down 12-14 hours a day..

I can directly relate to this article, it's been a few times where I go "Doh, why did I waste my time on that when I could of been doing this"?

James F