The first thing a dropper should do is to analyze what went wrong in their last attempt.
Acceptance of failure gives you more strength to prepare well for the next attempt. After understanding the concepts that you are weak in, start focusing more on them.
Try to keep a realistic timetable. Divide your time depending on the concepts you need to learn. Know the syllabus for this year and set achievable targets each day.
Take the best possible help from your mentors to clarify all your queries and doubts.
Make sure you maintain consistency in studying throughout your preparation for your NEET exam, and try to avoid relaxing for a long time that can distract you from your goal.