1. Writing Matters a lot, the same answer will get Different marks in good or bad writing, keep your writing readable.
2. Use a proper pen which suits your hand.
3. Practice previous questions to help you prepare for the exam. Ignou has been repeating some questions for the past years.
4. Most of the previous(exams) qsn's answers you will get in ignou books itself, if you don't have a hard copy of books then download pdf books from the ignou website.
5. During the exam, focus on the questions you know perfectly. Write them down first, then come back to the other questions.
6. Try to Draw The Diagrams for a better explanation.
7. Write your answers in Points and Headings.
8. IGNOU doesn't provide an extra Sheet, you will get one having 13 pages means 26 pages including both sides so write accordingly.
9. IGNOU Allows Calculator In Some Exams So don't Forget That.