Hi Dheeraj
There are no fixed ways of how to attempt a paper and maximize your score, because it varies with every individual. But while you take your mock tests, you will understand that a given pattern of attempting questions, selecting which subject to solve first will yield you the maximum output in terms of accuracy and number of questions attempted. You should practice more to build on this strategy of yours as selection of questions in a right manner will be an important aspect of a tough examination like JEE Advanced examination.
When you start writing the paper, ensure that you maintain a steady pace during the three hours of examination. Students usually have a tendency of starting slow and rushing towards the end, which greatly reduces the accuracy level.
At times, you will encounter questions that are speed breakers or the ones, which you are not able to solve after spending a considerable amount of time. If you find that a particular section (physics, chemistry or mathematics) of the paper is difficult, do not panic. In such a case, remember a difficult paper is difficult for everyone and start looking for questions which are easy. This will not affect your rank, as most of the candidates will not be able to solve the difficult questions in any case. Students who have a tendency of studying late must change their sleep cycle and study every day from 9am-12pm and 2pm-5pm (JEE examination time) to make it the most productive time period for them to score.