Build One Sheet Per Subject

As you finish each chapter, add its key formulas to a single running sheet for that subject. Keep entries compact, noting the formula, the meaning of each symbol, and the condition under which it applies. One organised sheet per subject means you always know where to look, unlike loose notes scattered across many places. This habit also forces you to decide what truly matters in a chapter, which is itself a useful act of revision.

One running sheet for each subject
Record symbols and the condition of use
Add entries chapter by chapter as you learn

Revise by Active Recall

Reading a formula sheet feels productive but builds only recognition, not recall. Instead, test yourself: cover the page and try to reproduce each formula and the situation it fits. Struggling to remember and then checking is exactly what strengthens memory. Schedule these recall sessions with spacing, revisiting after a day, then a few days, then a week, so the effort to retrieve grows each time and the formula moves into durable memory.

Connect Formulas to Problems

A formula remembered in isolation is fragile under pressure. Whenever you revise an entry, recall a problem type where it applies and the trap that commonly comes with it. This links the formula to the moment you will actually need it, so retrieval in the exam is triggered by the problem itself. Over time your sheet becomes not just a list but a map connecting tools to the situations that call for them.