Three fundamental areas need to be excelled for success in exams.
1. Concept: This is very important to understand and what are its applications. Develp interest in this topic.
2. Attempt to solve problems based on this concept with the help of prior knowledge we have. Let this take more time and its worth give a try. This brings up the talent hidden within us and boosts confidence if you are able to solve atleast something. You can take more time to solve at this stage. Never mind. Its a important phase.
3. Practice, practice, practice...