There are a million and one ways to not write.
One way is to buy writing software or go to a name generator online and play for hours deciding on a name, plot, or some other writing related detail. You can get great ideas from these.
Another thing some fiction writers do is outline the entire story, write extensive bios on the principle characters, research, research, and research some more.
Besides all the legitimate reasons that get in the way of writing, especially for moms/mums, I doodle.
When the writer's mind is gone for the day, yet I want to feel a pen in my hand (I write on the computer), I doodle with pen and ink. I don't use anything fancy, just a regular gel pen and printer paper and lots of circles and short lines. A different view of this doodle was in my December 2008 newsletter http://nadinelamanbooks.com/pdf/brag12-08.pdf
Happy Thanksgiving! I'm taking the rest of the week off!