What if you adopted the mantra, "I'll sleep when I die!" for the next six months with a focus on your project at hand?
Or how about the classic, "Carpe Diem," for the next three months until that deadline?
I'm not talking about killing your body or pushing your mind, heart or soul to an unhealthy breaking point. But instead taking one season of life - with parameters that keep your spouse, family and general responsibilities intact - and giving yourself over to that singular focus in place of movies, gaming, alternate hobbies, side-gigs, distractions, YouTube, TikTok...
What could you accomplish? What sort of joy might you find? What would you learn?
Take a sabbath, for sure.
But, if not now, when?