i m preparaing for iit jee...sir what should i do..i am pretty confused..i was getting good marks in exam..but from past three months as the portion has increased the graph of marks is going down...i m very tense and i think its difficult to for me to crack jee...sir pls help with some tips and how to study

dear chirag 
kindly check out the askiitians blog , u will get many tips their to study , 
and donot get tensed , maintain your calmness . u need to do the following things 
1- keep revising the content regularly , without that there is no use. 
2- while studying any concept , kindly clear the concept and donot cram anything , 
3- take mock test chapterwise everyday and review it regularly . 
4- do some meditation , thats imp for concentration boosting 
HOPE IT CLEARS 
REGARDS