Hiya,
It really depends on your revision style, so prefer to work under pressure others prefer to go steadily. -Don't worry about others and do what suits you best
I would suggest you write down all the things you've got to revise, highlighting the priorities and put together a plan being realistic about how much you would be able to do each day.
You can get organised now maybe making revision cards, learning smaller aspects like key words to save time later but I wouldn't start just yet as otherwise you'll be so revisioned out by the end. (I'm going to start after half term).
It's the quality not the quantity of revision that counts - learning the exam technique as well as the content, reading texts for English properly e.t.c