is this a common phrase or regular expression? American or British english?

I do this all the time, and when I start to feel like I'm going to crash, I force myself until I'm close to the next deep insight (like when you see a set of equations slowly taking a certain shape and you think "ok, I think I see where this is going") and stop reading there and then, go to sleep, and the next morning ... the very first thing I think about is finishing that train of thought... It somehow helps me remember the information better, I don't know why but uf I had to take a guess: when we expose ourself to information we aren't wondering about, our brain does not perceive it as important, while if you set up the experience as a cliffhanger, you trick your brain into pondering the unfinished train of thought, both as you try to fall asleep and the moment you wake up and realize you want to finish the train of thought... it's like you get to pick one low effort memorizable deep insight per day (you could reach more during the day, but those require higher level of effort, and don't reside in the uncertain or pondering phase long enough to subconsciously gain importance, we remember our big breakthroughs not our smaller ones, and when you know you will read the answer in a few seconds your brain exerts less effort in pondering the questionn)