Preparing for AIIMS and NEET needs a lot of dedication and planning. The syllabus is vast so it would be wise to follow a structured and steady approach in course coverage.

Now you have 2 months for NEET so you should try to complete NCERT books and  select topics who have more weightage in NEET exam in previous years exam: 

Check last year analysis of NEET Exam:

http://www.medicine.careers360.com/articles/neet-2016-phase-2-analysis-aakash

Also solve previous years NEET/AIPMT exam papers and mock test series to understand exam pattern.

Candidates finds Physics as tough paper because of the variety of theories and mathematical problems. This subject is not only about derivatives and formulas but only through the right applications of the same can lead to slution of problems. Therefore, one must have form command over theoritical concepts and its derivations. Tpics on which candidates must focus are work, energy and power, system of particle and rotational motion and gravitation ,thermal properties of matter and thermodynamics, electric potential and capacitance , electromagnetic induction and alternating current, atom, nuclei and semiconductors.