We all have those days where we don't have the inspiration to write. This trick has a 100 percent success rate
Use a stopwatch and set a timer for 10 mins when you start writing. I use a stop watch chrome extension
Just write all that comes to mind for 10 mins. You may get the urge to edit but just don't. Let the words out, you're on the clock.
That's all it takes to get the ball rolling. Once you have your first draft ready, then you can work on editing