Ask your instructor
If you have questions, as soon as possible, go see your instructor during office hours. If the answers to your questions requires you to rethink material, you will want to have time to review.
Join a study group
Study groups can be a very helpful way to prepare for finals. Many students find study groups most helpful when the time is structured. Consider trying these study group activities to make the best use of time.
Attend organized review sessions
Use review sessions to get answers to any questions you have about the materials and the test. Ask your instructor about departmental or class review sessions.