Dear aspirant

I hope that you are doing great preparation the exam . First up all don't be tensed for the exam. For the 25 days you should try to solve more neet questions papers of the previous years and find your weak points and chapters that you couldn't answer.Revise more questions from that chapter. Do as much mcq questions you can before the exam. Make sure you study only from ncert textbooks and pratice the problems and exercise given in the textbook. You can also attend a crash course before the neet exam.You can refer previous year neet question from the link given below

https://medicine.careers360.com/articles/neet-question-paper/amp

All the best for your exam.