Yahoo's Marissa Mayer explains how she worked 130 hours a week and why it matters (businessinsider.com)

While not doubting Marissa has worked incredibly hard both at Google and Yahoo, I would like to see how effective the work was during those all nighters and 130 hour weeks with no holiday.

There are times you need to stick with it and burn the midnight oil but this seems to indicate something is broken somewhere.

I guess an example of what not to do is valuable.

I don't think anyone can work 130 hours in a week without some serious class A drug abuse - at best you can be present while some people work around you.