Hii!
Since you haven't specified about the exam you are going to answer tomorrow or the course which you are enrolled into, we cannot suggest you specified instructions. But remember, you are what you think you are, so please don't think you are a weka student, but puch yourself and try to study and focus more. For tomorrow's exam, just stay calm and give whatever answers you know. But, learn a lesson and start studying from the very first day you start a course or study. Only hardwork along with smart work can help you succeed. Show some dedication towards your studies, stay focused and practice. Make shirt notes and keep revising.
Hope this helps.
Good luck!