I assume that you have finished your studying for the exam (either by watching our lectures, which are a complete course for Paper F2, or by using a study text).
Assuming you have, then the most important thing is to practice. We have short online practice tests for each chapter, and also a full online mock exam under time pressure (with different questions appearing each time you take it) – you can find these all linked from the main Paper F2 page.
For more practice you should buy a Revision Kit from one of the ACCA approved publishers.