Hello buddy, you should prepare very hard . You should focus on the most important topics of jee main. Solve the crash course books of Physics, chemistry and math. Don't try to learn any new topics, you should prepare your strong areas. Revise all the formulas & reactions. Don't be nervous and work hard. You should solve the previous year question papers and cram  and understand all the answer, formula  of previous year questions. 3-4 questions in the jee main paper are from previous year. Time management is very important during the 3 hour exam. First solve the questions of subject in which you feel more comfortable and don't waste more than 2-3 min on 1 question. Work hard and achieve what you want. 

Dear Ajay,

In two weeks you should focus on revision part. Focus on the chapters which carries more weightage in the exam. 

JEE Main is all about the practice and time management so solve as many as mock test series for your practice and work on your strength and weakness. 

You can also refer to previous year papers to understand the level and type of questions asked in the exam.

Good Luck!!