Just one more tip on your essays...try to actually write several essay plans even if you don't get the time to practice your essays on questions you think might be in the test. This way you will actually know what your structure and plan would be, and you have all thes things you need to talk about before you go into your exam.
I didn't memorise any essays for my exams...I find that usually screws me up because I end up not answering the question and I spend the whole time trying to remember my essay rather than actually answering the question. I was lucky enough to have guessed both the inflation and u/e essays last year, and wrote one practice essay on each and got my teacher to mark it. So when I got into the exam, I knew precisely what sequence I was going to go in, and what are the major points i need to talk about and what interesting points i can raise in my conclusion and intro etc. This just makes it soo much more easier with your essays. So even if you don't practice writing essays (and if you do, try to do it in one hour blocks), write up some detailed plans......such as intro blah, paragraph one blah etcetc and conclusion blah......it'll really help in your exam.