If you want to concentrate on your study as well as want to develop a habit of regular studying then very simple the first thing start studying with any of your subject of interest. No other thing can better help you than this.
Studying and EXAM SKILLS are two different things. And you have to focus equally on both, if you really want to perform best in exams. Try to Follow these and you will definitely find more than 10% improvement. (if you are scoring below 90%)
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