I've been concentrating so hard on revisions for the last month that I've hardly written a word. Up until now, I've either solely written, or I've done a mix of revising and writing during the day. I have written every day for the last two years, and the two years before then, I wrote nearly every day. It's part of my routine, and when I settle down to write, it flows quite easily.
About a week ago, I realised that I needed to add a chapter to my WIP. I could see the piece of story very clearly, but when I sat down to write it, nothing came out. It seemed to be a mix of being overly critical of every word I typed, rather than letting it flow, and the words not being there for me to type. Even my ability to write a blog entry had dried up.
It's taken over a week to get my head back into the place where it needs to be for things to start to flow. All the ideas were there, so, I'm guessing that I was lucky that my head didn't explode.
I can only conclude from this, that I need to write every day.