There is a little trick I learned in undergrad while taking Calculus and these other math courses. You want to give your brain a break. Meaning, at some point the numbers start to float together and no matter how hard you work- the stuff is a blur. Take a break. I typically take 10-minute breaks in between one-hour intervals. Because I notice that my attention span is roughly an hour to an hour and a half. After that time, anything I am reading will get lost in the scuffle. So everyone is different. I know people that can read for hours with no problem. I am not one of them. I need my snacks and fresh air. And then there is this thing my brain does where I can work on a problem in my mind even though I am taking a break. I am not sure if anyone else experiences the phenomenon and no I never researched it. But my point is – you need to take breaks. Play video games or call a friend. Even take a good shower. But take a break.
Moore to follow-Amy