My recommendations follows.
To increase your chances, I would not recommend a preparation before the training but:
- before the training: find/buy ITIL practice tests,
- during the training: take notes, build a glossary, sum-up each chapter in your own words,
- before the exam, do as many practice tests as possible while making sure your sum-ups are covering all the questions,
- the day before the exam: forget the books/manuals, just make sure you have your glossary and your sum-ups in min,
- during the exam: relax, quickly answer the easy question first, take some time on the remaining questions, keep 5 minutes to review the easy questions.
