Finding the right balance of creating new and updating old is always tough. If you're anything like I am, once you start on something you want to just keep pushing it out. I could create blogs for weeks and forget about everything I need to keep up with. That's why waking at 2am and taking advantage of all that time was a great opportunity and definitely productive.
I get porn writer's block myself after so many. That's when I take a walk to the kitchen for some coffee and grab a break. I just sit at the table with my coffee, no tv, no music, no paper, nothing but coffee and a blank stare. That seems to help from becoming blocked and I can get back at it.