Practice on the difficult areas and complex formulae and clear your doubts from your teachers or your friends
Make separate notes for chemical formulae; physics and mathematics numerical
Practice diagrams and label them well
For general knowledge read newspaper and current news magazines like Panorama Year books and Pratiyogita Darpan for international news, scientific news, awards, conferences and launching of new programs like N-Deal etc.
You can also take coaching from Institutes for better training and learning quicker methods of solving the questions
Practice previous year questions booklets and more and more sample papers
Practice basic questions so that the confusions regarding them is not created as sometimes minor questions cause troubles which leads to waste of time
Revise books at least 3 – 4 times as many multiple choice questions are derived from the inner – core of the chapters
Work hard but also rest completely so that your brain is not suffocated and it is well said "well rested mind leads to greater inventions"
Eat well and relieve stress by doing other activities for short period of time in between the study hours as it will help in retaining the memory and it will be helpful at learning the subjects more comfortably by unclogging your mind which may suffer due to continuous studies
Allot enough time to each subject and each topic such that no topic is left unstudied
The candidates must go through as many books as possible as it is not possible to cover the complete syllabus in one book only