Hello

Firstly appear for cat only if you are dedicated enough and prepared for all the hardwork. I assume maths and LRDI is strong enough.

Start with your strengths revise all the basic concepts of qa and start solving sums from various books and past CAT papers so that you become aware of the standard. Do this for 20 to 25 days. After this start with DI solve DI papers and clear your concepts. Do this for 3–4 hours a day and along with that do QA for 1–2 hours. After a week start with LR. Do LR for a week giving 3–4 hours and 1 hr on QA and 1 hr on DI. In DI you must try and solve 3–4 sets in 1 hr.

This will 2 months. Now start with English. Solve 4–5 rcs of different genres. Prime focus being economics and philosophy. Do this for 10 days where prime focus in rc. Meanwhile also revise qa and lrdi.

After this start solving papers. Time Limit yourself. Learn for mistakes. Analyse each and every paper carefully. Don't repeat your mistakes. Solve 40 papers before appearing for cat. Also revise formulas and basics on a daily basis. When solving papers focus on para jumbles too.

Study sincerely and you'll succeed. Strategise your performance. Be quick and clever in solving papers. Don't aim to attempt the whole paper. Try and attempt what you know! Attempts are not important marks and percentile is. Attempting 10 and getting correct 2 is much worse than attempting only 3 and getting 2 correct!

I hope it will help you 

Good luck.....