Keep your hand moving, as the wonderful Natalie Goldberg would say.
Set a timer. Write for ten minutes. Go, go, go.
Bang out that blog post. Scribble on the bottom of that shopping list, theatre programme, bit of old paper you found in your pocket or glove compartment.
Editing? That’s for later. It actually uses different skills, perhaps even different neural connections.
Right now, your task is to make as much mess as possible.
Don’t be afraid of mess. Chaos, at this stage, is your friend. It helps you to bypass that irritating inner voice, the one that usually stops you from even risking a word.
Stick your fingers in. Splatter stuff around. Taste. Touch. Spill.