Short answer: Use previous year questions to learn the pattern and mock tests to practise timing. Review every test within a day while the mistakes are fresh.
Weekly rhythm
A workable routine is to cover new chapters on weekdays, do chapter-wise questions on the same day, and take one timed test at the weekend. Adjust the load to the time left before the exam.
How to review a test
Split mistakes into three groups: did not know, knew but slipped, and ran out of time. Each group needs a different fix: revision, careful reading and pacing practice.
Clean copies for tests
Buy a fresh copy of mock test books you plan to attempt, because marked answers from a previous owner spoil the practice. Use second hand copies for reading and practice sets instead.
Frequently asked questions
How often should I take a NEET mock test?
Many students take one full test a week and increase the frequency closer to the exam.
Should I redo wrong questions?
Yes. Re-attempt mistakes after a few days to confirm you have actually fixed the gap.