Practical Approach to Revision

With exams just a few weeks away, i would like to ask for guidance of the most practical way to approach revision. While I’m not asking for aid in question spotting, nor am I suggesting such in this query, I would like to know the key areas of the syllabus that having fair knowledge in would you consider mandatory.

And then also how to approach revising these areas as p3 is a monstrous syllabus in reference to quantity covered.