Take it from someone who knows: It isn't about reading everything and spending every waking minute studying in the naive belief that to do otherwise would be wasting valuable revision time. You can read too much, you can mentally exhaust yourself. Infact, you can read so much that you can't remember in which of the 12 books or journal articles you saw that really useful quote/table or idea. I've seen people be in the library before me, take shorter breaks than me, still be there when I leave, and study longer, and harder than I. I don't think I necessarily did better because I'm naturally better- although I think in life you will find those who somehow find the right answers and draw the right conclusions from a mere skim of the material- and thus far I've been one of those people. I do however believe I study more efficiently, and cover the right things to get a broad base of material to build on- and I've taken law modules, I know what they contain. Too many first years are awful at studying efficiently, I've ran tutoring classes for plenty of them and it's a common characteristic- a month of cramming for a first year exam that doesn't carry a lot of marks is detrimental in the long run- even if you do well in it, as the workload increases, it creates bad habits to just read more and more and more in later years- and eventually there comes a point where that tactic won't work, and a few exams go horribly, and people walk away having not learned the lessons they should have in first year, with a 2:2.
Of course, some of that could just be students who peaked at school- and that's happened plenty of times, or were just lazy. I'm also personally wound up by how busy the library is in Glasgow for very specific times of the year, and how people think the place is some sort of social area where they can whisper across tables very loudly.
On that rather cheery note. I'm back on TSR.