This is one of those things I'm always reluctant to do. Mainly because I think if I keep changing gears then nothing ever gets done. So I have to rationalize to myself why it's okay to work on two things at the same time (more or less). It's totally Freud:
According to his model of the psyche, the id is the set of uncoordinated instinctual trends; the super-ego plays the critical and moralizing role; and the ego is the organized, realistic part that mediates between the desires of the id and the super-ego. The super-ego can stop one from doing certain things that one's id may want to do.
It's sort of like this constant war between three parties: the one who wants to sit on the couch and watch Netflix and eat cinnamon buns with cream cheese frosting, the one who's industrious and constantly cites the dangers of not following her advice - exactly, and the one who mediates between them.
Anyway. A compromise was reached between the parties in which it was agreed that if we weren't going to work on RUN (my YA/NA Apocalyptic), then it was okay to finish revising GRIMOIRE (my witchy regency romance). Out of everything, it's the most revised piece of work I have, and all I had to do was fix the ending, a mere fifty pages. As you can from my progress on my sidebar, I'm at 92% which is a pretty nice number to be at. Almost done. I can do this. Then I can figure out the character issue I'm having with RUN. But that's another story...
So, do you argue with yourself? Who wins?