Judgment writing is graded as much on structure as on legal correctness. Every judgment you write should follow the same skeleton: brief facts, points/issues for determination, discussion of evidence and law issue-by-issue, and a clearly stated final order — examiners lose patience with answers that mix these stages together.
Framing issues correctly is the single highest-leverage skill in this paper. Read the fact pattern twice before writing anything, list out every disputed question of fact and law separately, and make sure your issues actually cover everything the parties are disputing — a missed issue usually costs more marks than a weak discussion of an issue you did include.
When citing precedent, prefer a small number of well-known, directly relevant Supreme Court judgments over a long list of loosely related citations — examiners can tell when a citation is dropped in just to pad the answer rather than to actually support the reasoning.