NEET is all a time game. If at all you know the concepts very clearly it won’t help much unless you are fast and precise enough to solve questions quickly. To keep my answer short and precise I recommend students to practice more and more questions. Clear up your concepts by solving more and more questions. Always keep in mind at the end of the day it’s the 3 hrs which is gonna decide your fate. So be smart and start preparation with proper emphasis to time.
Keep solving problems until questions get into your muscle memory. You should be capable of ticking bio MCQs the moment you finish reading the question. For physics you brain should get into the exact slot of concept once you read the question. Same goes for chemistry .
I hope it helps.
Feel free to ask stuffs.