To score 230+ in JEE Main exam requires lot of hard work and dedication. Revision plays very good role to score good marks in your exam. Be sure you do it with proper planning. If you want you can also make your time-table. It will help you to focus. You can also set you daily and weekly targets as well.
Below there are some tips to score 230+ in JEE Main
Concepts should be crystal clear in your mind. You should revise your whole syllabus to brush up your concepts. 

In last days of your preparation you should focus on the topics which carries more weightage in the exam. 
Selection of Books
DC Pandey and H C Verma are enough to build concepts in Physics.SK Goyal would be ideal for Maths (Algebra). Maths is a scoring subject and if you are referring to this book, you can easily score around 80% here. NCERT, however will still remain your primary reference book and that cannot be ignored.

Refer previous year papers to understand the exam pattern and to know level of the question asked in the exam.
Solve complete mock test series to analyse your preparation level at regular interval of time. It will also help you in time management.