It is your second time you should be dedicated and motivated to crack your exam. If you want to clear your exam in 2nd attempt it is important that your basics should be cover. You can make your important notes which will also help you in revision. Before going to next topic you can prepare lot of problems. While you are on the new topic, practice high level questions on the previous topic simultaneously.
You can also make your time table to complete your syllabus on time and you will get proper time for revision.
You have less time to prepare so focus on the topics which carry more weightage in the exam.
Make sure you complete your NCERT book to score good marks as syllabus is based on them. Exercises which are given at the end of completing chapter are very important and there are chances that you can also get direct questions from it. You can also go through NCERT exemplar.

Analyse all your mistakes from NEET exam of last year and work upon them.

After topic wise revision, you should start with test series, online or offline, quite early. As it creates exam-like environment, you come to know your mistakes and shortcomings and you can work upon them.