What is the trick to score high marks in cbse board exams of cl 10?

i'm currently studying in cl 10.i want to score high marks in board exams. i get less marks in english and hindi (78 - 82) and iwant to get at least more than 85 %. and in s.s. some tricky questions also come, so what shall i do? plzzzzzzzzzzzzzzzzz help me