Something also that I noted is that it is somewhat easier to do the task you don't want to do when you're tired / sleep deprived - mostly because effectively, my brain is too tired to argue against doing the thing.
This actually worked really well for me after a hell week and a presentation at the end. Often I get self conscious and freeze up at some point, but I was so wiped I just powered right through without a hitch. It was kinda weird.
This is how I got though college classes I found boring or tedious. I'd just stay up all night doing "interesting" things, then about 6am I would actually do the homework assignments, studying, etc I didn't want to do.
I'm sure it wasn't an effective strategy for information retention, and I developed pretty terrible sleep habits which plagued me for years after. But the homework got done...
This works, which is why many code and study late at night. But it has the side effect of trying to do things with the inefficiency of a tired brain, plus being too tired to resist other temptations.