What are your writer’s superstitions and rituals?

Since today is Friday the 13th, I’ve been thinking about superstitions in general and writing in particular. The writers below share their insights about writers’ superstitions and rituals.

In this post at the Nouveau Writer, Mariana Ashley reveals The Top Five Writing Superstitions of the Greats.

Cat Woods (@catewoods) conducted an unofficial poll of 45 writers and found that 37 of them had writing quirks or superstitions. She lists some of them in this post at From the Write Angle.

At the Indextrious Reader blog, you’ll find a post by Canadian blogger Melwyk that includes a poem about superstitions and a cat.

What are your writing superstitions?