The last 48 hours before a paper

Two days out, the useful question changes. It is no longer "how do I learn this subject" — there is not time — but "how do I get the most out of what I already know".

Those are different jobs, and the second one has a clear method.

Stop learning new topics

If a chapter is genuinely untouched with two days to go, it is usually not worth starting from nothing.

The exception is a topic that reliably appears and has a small, learnable core — a formula, a definition, a standard derivation. Learn the core, accept you will not master it, and move on.

Otherwise, spend the time strengthening what is nearly there. A topic you half-know can become a topic you know in an hour. A topic you do not know at all will not, and the hour is better spent.

Work from your mistake list, not the textbook

By now you should know where you lose marks. Go there directly.

Re-reading a chapter you already understand is comfortable and produces nothing. The questions you got wrong three weeks ago are where the available marks are sitting.

If you have kept a notebook of mistakes, this is the moment it pays for itself — go through it and redo the questions cold.

One full paper, timed, the day before

Sit one complete paper under exam conditions, at roughly the time of day you will sit the real one.

This is not to learn content. It is to arrive at the exam with the experience already fresh: the pacing, the stamina, the feeling of deciding to leave a question. That rehearsal is worth more in the final 48 hours than another few hours of reading.

Mark it, note what went wrong, and act on the timing lessons rather than the knowledge ones.

Make one page

Condense each subject to a single page: the formulas, the definitions you always confuse, the diagram labels that escape you, the three mistakes you keep making.

The act of compressing is itself revision, because you have to decide what matters. And you then have something you can actually review in the last twenty minutes — which a textbook is not.

The night before

Stop early. Prepare everything you need. Sleep properly.

This is the advice everyone gives and few follow, and it is the highest-value thing on this list. Recall is measurably worse when you are short of sleep, and it degrades across every question on the paper, not just the ones you were cramming for.

Trading sleep for two more hours of revision is almost always a bad trade.

On the morning

Do not attempt to learn anything new. Read your one page, eat, arrive early, and stay away from corridor conversations about what is likely to come up.

The preparation is finished. The remaining job is to produce what you already have, and that is best done rested and calm rather than frantic and informed by four extra minutes of cramming.