Find out where you can get past papers or sample questions for your course.

Using past papers and sample questions will help you get used to the format of the paper.  Perhaps answer questions against the clock to get used to writing for an extended period and to get your timing right.

Do you need more than just a few sample questions?

You might work with class mates to create your own “exam paper” using a selection of tutorial questions from your course.  You could then work together to answer these questions.