Just watched this video about why work often doesn’t actually happen at the office.  The central problem is that there are far too many distractions in a day and people work in different ways so hours go by and people are just not very productive.  

I love the idea of “no talking” time and although I am the only person in my office, calls, IMs and unnecessary apps open on my laptop can really interfere with my productivity.  A lot of this is more about my self-discipline but these are great principles to bear in mind.

Jason Fried: Why work doesn’t happen at work | Video on TED.com