[YeGoblynQueenne]

I've had the same problem for a very long time. The solution I found was to choose a subject that I am really interested in and that's really useful to study, but that severely taxes my mental faculties. I then dedicate the last few hours of the day to studying it. The intense mental effort almost never fails to put me to sleep within a very short time after beginning.

Reading about such a subject (rather than say, coding) works best. In fact I discovered this effect when I noticed there were a few papers I have still not managed to finish reading, even after several attempts (see for example [1]).

If all else fails, I put on a youtube video of a Noam Chomsky talk. That never fails. [2]

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[1] Nienhuys-Cheng and de Wolf, The subsumption theorem in inductive logic programming: facts and fallacies.

https://homepages.cwi.nl/~rdewolf/publ/ilp/ilp95.pdf

[2] To clarify, I love Noam Chomsky and I consider him a great teacher to me, both in politics and science. It's the way he talks that gets me: he's so calm and his voice so smooth and soothing, that even when he's talking about very upsetting subjects like climate change or nuclear war, my mind just shuts down and I go to sleep like -this.