For instance, while I was reading the article on this I suddenly got the great idea to write a SciFi/comedy. I had to reign myself in, take some notes on that concept and remind myself what I wanted out of this project.
"...Settle on the overall mood for your story ..."
There is a whole article written around this exercise direction, but it all helps you do this and boils down to this.
At the time I was working on the initial phases/days of this I was anxiously anticipating the return of Mrs. Prop from a week long business trip and that permeated my thinking and mood. Consequently the mood of this story/world bent to that, so this IS really a good day to reevaluate that.
Do I want to keep this mood? I have to chuck most of the work I've already done to re-direct the mood of this. I do want to keep the mood that struck me in those days of anticipated reunion, but I want to make it a bit more serious. I can keep it fun an escapist, but a bit more passionate and maybe just a tiny bit impactful.
I've actually been working ahead when I can and when I got to day 11 and the Speculative Element I realized that this whole exercise was originally written for people writing SciFi, Fantasy and Horror. I wasn't really intending to write that at all, originally. After mulling it over I realized I could keep my mood and yet still be SciFi.