I don't think studying right now is a good idea, you havn't finished the course yet. I suggest start studying during the easter holidays or during May.
i have doubts i will even finish my classical greek course...
My history teacher is starting weekly revision classes after half term (doing past papers, etc) so I'm going to revise the work we did on Germany as I've forgotten most of it!
I'm by no means going to extreme lengths with my revision but I might slot in a few hours over the course of the next couple of days. It's important to relax as well.
I intend to re-read my English literature books over this holiday...in fact, I ought to read Hard Times for the first time
My science teacher reminded me of that before exams and it couldn't be more true. Efficient revision is the key and focus more on the things you don't know so well, whilst cementing your knowledge and understanding of the topics you find easier.
I think I started revising for my GCSEs in the Easter holidays and that was about the right time for me, but it depends on the person. Some people would need more time to revise and some less, depending on how confident you are and how quickly you work. I'm planning on starting to revise for my AS-levels in half term though, as they're a lot harder and the exams are a fair bit earlier.