Sweet revision time

the trick is to learn stuff as its taught, it sounds blindingly obvious, but if you make a point of remembering stuff in lessons, revision becomes a simple case of jogging your memory rather than learning stuff from scratch.  I only learnt this once I got to university, I wish I'd listened to my teachers at school. 

The only other tip I can give is not to do too much at once in the run up to an exam, you will burn yourself out, rather do a bit of each subject each day, save your energy, revision can be tiring. 

Good luck one and all