Check out Resonance Rank Booster Material for JEE Advanced. It is a Complete Revision Package and if done regularly, you will finish the Full Set and Sample Papers by July. Try revising formulae regularly, follow Handbooks like Allen Mathematics Handbook (PDF Available) as well as Arihant Chemistry and Physics Handbook. Secondly try opting for an Excellent Online Test Series now. Test Series helps you get confident with your Test Taking Strategy and Preparation for the Examination. From my personal experience, Allen Leader Online Test Series is one of the best Test Series for JEE Adv.

For more information and JEE Adv Preparation Tips do follow the link below

https://engineering.careers360.com/articles/jee-advanced-2021/amp