All of that said, there are no clear "do's" and "don'ts" of writing, there is just you and your novel. You know what works for you, so do it. Do whatever it takes.
Congrats to all of those who finished this year! We did it!
*For the record, I appreciate you serving me ice cream, even at 3 AM.
** It helps that Starbucks is magic. They'd have to be, or why would so many writers go there?