I'm still coming to terms with balancing out my own productivity as I often struggle with the process of stepping away from a project and assessing what can be done to improve the way I'm working. Another thing that occurs for me is that I tend to work with deadline stress that exceeds urgency and this tends to make the process not very enjoyable and the result not very well polished. The article does suggest some ways to work around moments of stress.
I place part of the blame on working within industries that demand a finished deliverable in a short a time frame and a small budget. To speak metaphorically, you often wind up with a dish served luke warm, filled with frozen veggies. After 15 years in my current industry, this workflow is so well ingrained that I am having a great deal of difficulty making the transition to something more free flowing and organic while still coming up with a final result.
Although we all struggle with the criticism of our own inner dialogue, I often use couples in creative industries (ie Matt & yourself, Ashley Wood/TP Louise) as examples to my wife as to where we would like to be in the near future.
I must apologise for rambling so much! Maybe this would be a good conversation to have as a wall thread on your facebook page? Perhaps a number of other people would be interested in a conversation along these lines?