Heyy,
So I'm no alevel expert- not in any way! (disclaimer loll)
With Psychology I'd say all you need is the perfect essay structure and a fast hand (particularly in y13)- which I'm sure you can get with practice! Once you've perfected that one essay, you can apply the same technique/plan to all essay questions and it gets a lott easier with time. And yes, do make sure you know all the names of the hundreds of different psychologists and their studies- I know, seems pointless and can be pretty boring and frustrating... But. Just. Do it
Maybe make mind maps for each exam paper of all the studies you need to know for that exam. Again, perfect your essay writing technique for y13 and do past papers; maybe under timed conditions-because some of these exams are really tight for time. Make sure you've written every single essay that can possibly come up. Staple all the possible essay q answers for each unit together and then use those essays as model essays to 'revise' from (after they've been marked. If you don't get full/ almost full marks on that essay, then act on any feedback till the essay is worth all the marks). I remember reading thru and highlighting my essays just before the exams.
Never underestimate the weight of research methods in these psy exams (I neglected it And genuinely think that cost me the A* grade because I was half a mark off and I feel like I deffo didn't do great on research methods. I found it extremely boring and so did the teacher so she just sort of skipped Over it. I never really went over it at all before the exam in y 13 because it put me to sleep.). Research methods section is usually the part that's easier to get full marks, or very close to full marks in because (in y13) the rest of the paper is mostly essay based and essay marking is so subjective.
Oh. I forgot to mention- Use your textbook and any additional class notes/handouts to write your psychology essays. I didn't even have a textbook in yr12 (for some reason, my sixth form assumed that some crappy AS psy revision guide would be fine? Loll, I stuffed that somewhere and forgot all about it). BUT my Main source in y12 (apart from class notes) was
http://www.simplypsychology.org/ I'm not sure how much the site has changed since then (it's been a year), but it worked as a pretty awesome AS psychology textbook at the time! Maybe check it out; I remember it being structured very well.
Oh, your 12 markers deffo shouldn't be a couple of pages long- make them a lot more precise, you can still get all the marks and it makes your life a lot easier. If I can find my Yr12 stuff, i'll show you one of my 12 markers
I will send you those Sociology essay structure tips, hopefully tomorrow- dw I haven't forgotten