How do I prepare for an exam you're not supposed to revise for?

1. Stay updated - knowing more about the world gives you more things to talk about. 

2. Have an opinion - easier said than done! Try asking yourself WHY you think that. 

3. Practise - time management and essay structures are things you can try and be familiar with. 

Remember, LNAT is supposed to be a test of your abilities, unlike "normal" exams where your knowledge is tested.