1)Try to create interest in the subject topic
2)Don't just byheart the concepts,but understand it
3)Review ur notes daily
4)Mark the important points in textbook and read it everyday
5)Revise the concepts and connect it with real life experience,read it as a story.
More than everything,read daily and be perfect in the topics and if u have any doubts,ask out with ur teachers...
Hope u got it:)
and mark it as the best if u understand well:)