Before you chart out a plan to crack CAT in the first attempt, you must familiarize yourself completely with the curriculum.
Once you know the topics and sub-topics, you can identify your strengths and weaknesses and work accordingly.
The preparation of CAT must begin not when the notification comes out from IIM but much earlier when the aspirants make up their mind to appear for CAT.
It is essential to plan your strategy and have an action plan on how to attempt the questions.
Time is of essence in CAT. If you want to crack CAT in first attempt, you will have to work on managing time.