If you can get hold of papers from further back, try and spot patterns: does any topic come up every other year, for example?
However, there’s no reason he shouldn’t have beaten me in at least a few of those exams.) Since then I've seen the issue from the other side, having set hundreds of exam questions and marked thousands of exam scripts.
And I must say that the standard of exam technique apparent from many students at York, supposedly one of the top universities in the UK, is, to be frank, awful. Don’t do just one subject a day, you’ll get tired of it; then again swopping too often means you don’t get the chance to get deep into anything.
Start by revising early so you do not worry about forgetting anything and you have time to learn everything.
If there is anything you are unsure of, ask a teacher for help.