Asking a writer what he thinks about criticism is like asking a lamppost what it feels about dogs. ~ John Osborne
There is something comforting about turning off the TV, putting the phone on silent, locking the door, sticking the kettle on and writing.
Pick a day when you can clear your diary and devote the entire day to writing. Start with random writing, jotting down thoughts and ideas. Try brainstorming and writing whatever comes to mind. Do this until you start to see a pattern emerging. When you have a theme, try creative a long narrative. It can be a memoir, a story, poem, commentary or anything that forms a complete idea.
Do this for one day, hide the remote control and try to spend the day on you own with your work.