Physics is one of the most important subjects in intermediate and requires a lot of understanding, patience and practice. You first make a proper and programmatic study schedule which you'll follow throughout your preparation. Then go through the entire syllabus. NCERTs the best books for basic preparation. You must start with NCERTs first and then you can move on to standard reference books such as HC Verma or DC Pandey. You can practice numerical problems from these problems as these books contain quite complex problems. Know the weightage of each topics and complete the easy ones first. Then move on to comparatively difficult sections. You can make your own notes if you find anything difficult. Write down all the formulae in a notebook. Don't leave any concept doubtful or untouched. Give mock tests regularly once you complete your syllabus. Find out your weak areas then, and work on them. Few months before the actual exam, do revise all the topics thoroughly. Revision is a must thing. Before appearing for the examination, you must go through all the points properly.

Hey !

First and foremost important thing is to be regular in revising your chapter on a daily basis. Remember, physics would be super easy once you go through the topic thoroughly for 2-3 times.

Practice numericals given in the textbook . And, study the derivations given in the NCERT only .There are sweet and short derivation, but, in board exam answer key will be according to NCERT derivation.

All the best!