I think sometimes when I get writer’s block, it’s because I’m working from the left side of the brain. I’m either too worried about editing and word choice, or I haven’t left the office at the office. Try to take a jog or hit the treadmill for half an hour. Do something physical that takes you away from your desk and away from your laptop. Do something to get the blood flowing along with the creative juices from the right side of your brain.
I know when I sit back down, I at least have a clear head. And often, I have started thinking about that scene on the treadmill and I have something to put on paper.