Make the exam feel familiar.

Exam-style questions on every topic, at HL and SL, with the markscheme beside each one.

Practice until it’s routine.
The more questions you answer, the fewer surprises the real paper holds.
Learn what examiners reward.
Check each answer against the markscheme and see exactly where the marks are.
See which topics hold up.
Your answers show where you’re strong and where the next hour should go.

Answer your first question tonight.