Firstly you should have good practice of different types of questions in jee. 

For it you must follow some standard coaching material. But be sure to learn completely  that material. 

Than you must practice a lot specially of comprehensive type questions . They help a lot

Do practice the latest mock series sincerely. 

In my time some questions were directly from it

Thank you

• Practice more than 20 mock exams
  
• Analysis of weak areas is must
  
• Revision for all mock exams and important formulae is must.
  
• Taking up basics fdom NcERT books for strong fundamental is crucial
  
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