I have an answer for you.... I will tell you later..

If I had a surefire solution, I would be working on finishing my third novel. But if you come up with a solution, please do let me know.

I like to clean because then I can feel like I’m accomplishing something. I discovered during law school that I would always stop working/writing etc. when I got to a particularly challenging point. That’s when I’d open Facebook. I’d force myself to identify what my conundrum was before I stopped and then I’d go clean or go for a walk and focus on the problem.

@FrayedBear You might determine how you feel about procrastinating: relief might = not ready to write; fear might = not ready to write. Where do you feel trepidation? Starting the spreadsheet? Then use individual sheets for each major and minor subplot. (Add subplots you might have forgotten or thought were unimportant. Its easier to cut than to add.) That way you are not etching it in stone, so to speak, on the spreadsheet. Each subplot might change position on the spreadsheet, but not in the larger scheme of things. I don't work well with deadlines (I fight against them). So what is a surefire solution? Pick your writing utensil (pencil, pen, computer, hammer/chisel) RIGHT NOW and write. You can fix it later. You can rearrange it later. You can proof it later. You can restart later. But Bear, start now Sometimes we can't begin because we don't know the ending. However, you can't write an ending until you know what you wrote.
INTRO . BODY . CONCLUSION. Your intro and/or conclusion can be created based on what the story has become. Just saying