First of all don't be tensed because your half strength goes there. If you are appearing for the first tym then you must familiarise with the syllabuys and exam pattern and work accordingly . Try to be consistent with your studies. If you are doing self study then then focus on your pattern of studying complete one topic or chapter the try to solve mcq from that chapter. Prepare your notes only for quick revision. Take care of your health and have balance diet before Exam . All the best