The best way to practice sample papers is to sit in a quiet place at your home on a chair with a table, just like exams, keep your water bottle and all stationary required with you. Make sure you have eaten prior to the session. Now start the clock and just like exams, solve the sample paper on an answer sheet just the way you will do in the exams. Make sure you switch off your mobile phone and any other distractions. Take help of your parents and tell them to act like an invigilator. Once you have done the sample paper, give the answer sheet and the sample paper to your teacher in schools or at tuitions to check. Or you can also check it with the answer booklet. Make sure you do a critical evaluation of the answer sheet and identify every single mistake, even spelling mistakes or bad handwriting. This will make sure you are prepared to give that perfect answer in your final exams.