Considering you are starting (or restarting) with your prep from 1st August, you have around 120 (4 months) days before CAT, as CAT will be on 29th November
If you are a serious CAT aspirant , it’s still possible to bell the CAT with high percentile in 4 months prep.  I will help in designing the outline for your plan with the help of the Facebook Cat Preparation – iQuanta group and iQuanta such that you will be able to build your own strategies.
There are two ways to get 99+:
1) You are damn good at two of the sections, for example, QA & VA, QA & LRDI, or VA & LrDi, while average at the third
One example of CAT 15 score:
QA : 99.7
LRDi : 99.9
VA : 88
Overall : 99.68  (IIM C)
2) You are equally good at all the three sections QA, LRDI, and VA. (Balanced Prep)
With 97%le each in all the three sections will land you close to 99%le overall. And 99 in all three sections will land you more than 99.7+ overall.
So evaluate yourself, and then make a plan on these lines
Note: The plan is strictly for serious aspirants aiming 99 + in CAT.
Considering you are working for 9 hours a day and 2 hours of traveling, 5 days a week, I have made a plan considering (9 A.M- 6 P.M ) as office time (shift your plan according to your timings)
You need to put at least 3-5 hours/Day on weekdays and 10-12 hours/day on weekend.(Please change according to your requirement if you feel exhausted).
The plan is divided into 80 days of Study and 40 days of practicing mocks. (80+40=120)
First, I would recommend you to take at least 1 mock (say today) and do the thorough analysis. Pen down all your strengths and weakness and create your own Plan.
Following are the Important areas from each subject : 
1. Quant chapters:

Approx number of Questions asked :

Numbers (4-5),(including indirect concepts in other topic questions)

Geometry and mensuration (7-8),

Modern maths (4-5),

Algebra (7-8),

Arithmetic (10), TSD – (2-3)

Functions and inequalities (4-5)

(Considering you want to complete your portion in this order only; change if you wish to)

Chapter Wise Plan: (Starting from 1st august)

Numbers [1st August to 14th August]

(1.5 hours/Day on weekdays and 5 hours/Day on weekends or holidays) for two weeks (14 days) learning concepts and solving sums from past papers as well :

[15th August to 6th September]

  • Arithmetic (1.5 hours/Day on weekdays and 5 hours/Day on weekends or holidays) for 21 days

    [7th September to 21st September]

  • Algebra (1.5 hours/Day on weekdays and 5 hours/Day on weekends or holidays) for 15 days

    [22nd September to 28th September]

  • Modern Maths(1.5 hours/Day on weekdays and 5 hours/Day on weekends or holidays) for a week,[29th September to 12th October ]
  • Geometry and Mensuration

(1.5 hours/Day on weekdays and 5 hours/Day on weekends or holidays) for next 14 days

[ 13th October to 31st October]

  • Leftover topics (1.5 hours/Day on weekdays and 5 hours/Day on weekends or holidays) for 15 days Revise leftover topics and practice

(1.5 hours/Day on weekdays and 5 hours/Day on weekends or holidays) for 20 days till CAT

[1st November till 29th November]

  • Keep practicing in CAT Preparation-iQuanta from Day1 (today) till 29th November randomly, as practicing randomly helps you to be prepared for Actual CAT more than a chapter wise practice does. 

Source:

  1. From any standard material you have in hand, along with iQuanta Sessions. Follow CAT Preparation Group posts/Events. Try to attempt questions there and ask doubts in case. (Most important)
  2. Solve CAT Past papers : https://www.iquanta.in/test/cat-previous-papers
  3. You may join iQuanta Quant Course which is of immense help to develop concept and methodology to tackle CAT questions. Regular sessions by iQuanta till CAT will help you be sticked to your plan and be regular which is the most important part of CAT Preparation : Regularity.
Verbal Area:
Reading comprehension
Sentence Corrections
Critical Reasoning
Para Jumbles and Para Completions.
RC and Verbal Area: (Starting from 1st August)
Keep a daily practice of reading for at least 30 mins, basically read some editorials and also try to summarize from what you read. (Do it in your office time if possible)
Reading comprehension (1 hour/Day on weekdays and 2.5 hours/Day on weekends or holidays) till November 29. Start with at least 3 passages per day then increase to 4-5 passages once you gain Accuracy.
Likewise, until November you will be able to complete almost 300+ passages)
Here quantity is not important, quality is, focusing that you gain at least 90% Accuracy.
Sentence Correction, Critical Reasoning, Para jumbles and Para completions. (It’s up to you how to do it, One generally should keep 2 days for one topic (45 mins/Day on weekdays and 2 hours/Day on weekends or holidays) ( 12th Sept – 30th Nov)
Vocab :
Focus more on overall comprehension rather than Word to word meaning at this point in time.
Source :
  1. Mocks and Sectionals of iQuanta and any standard Test series.
  2. CAT Preparation Group/iQuanta Events.
  3. CAT Past papers (https://www.iquanta.in/test/cat-previous-papers)
  4. For an extra edge help you may join iQuanta Verbal Course

LRDI Area :

– This area generally needs lots of practice to get hands onto a variety of sums.
– Keep practicing one day LR and another day DI for (45 mins/Day on weekdays and 2 hours/Day on weekends or holidays) [till 20th November]

Source :

  1. Mocks and Sectionals of iQuanta and any standard Test series.
  2. CAT Preparation Group/iQuanta Events.
  3. CAT Past papers (Most Imp for CAT) https://www.iquanta.in/test/cat-previous-papers
  4. For video classes on LRDI, you may join iQuanta LRDI classes till CAT.

Sectional Mocks (All the 3 Areas) :From August 1 till November 29

Daily take one sectional mock either of QA, LRDI or VARC, which can be from any standard source because you need to test yourself on topic wise as well once you are done with your study to get little confident and to ensure you have covered all the areas. You may increase the number if you are free that day, at least one sectional is must per day. (if that day isnt your Mock day)

Full Mocks :

Take at least 1 mock per week until August 31st. From September take 2 mocks per week.
Once you are done with syllabus; start giving weekly 3 Mocks. (you can do that even now if your syllabus is completed) Take as many mocks you can.
You can even opt for iQuanta iCAT Mock test series, first two mocks are free.
Total 15 Full Mocks + 30 sectionals + 20 Non CAT Mocks, Details : https://www.iquanta.in/cat-mock

Followed by Mock, analyse the paper, with your weak areas and then focus on your weak areas accordingly.

iQuanta will soon update the best way to analyse your mocks this month. Stay tuned. 

Note :

1) Try to solve questions in CAT Preparation-iQuanta, and iQuanta paid doubts group, whenever you see a question, that too fast, if possible try to be the first one to solve. Make it a competitive environment. This has helped all my students who got phenomenal percentiles this year.

2) Keep solving Questions from your materials and in case you get doubt, post in CAT Preparation group or iQuanta Paid doubts group.

Now let me help you to create 1-day plan (Demo)

Note : It is just a demo you can change things as per your weak areas/convenience.

Study Time :  8 PM – 1.30 AM,  It may include all study related activities whether classes or solving in the group or solving your own materials.

Ps: You may change the work timings as per your working hours. So

Weekdays :

8.00 AM-7.00 PM———Office time (Read articles/editorials in between and do practice 2-3 RCs in between office time)

Also in between office hours do try to solve the practice questions posted in iQuanta Paid group by iQuanta Mentors

8.00 P.M -9.30 P.M——- (Quant chap) (you can start it as soon as you get free from your office, say at 6 or 7pm)
9.30 P.M -10.00 P.M—– Break
10.00 P.M to 12.00A.M — iQuanta Classes: Weekly 2 days either of QA/LRDI/VARC (so 2+2+2= 6 days a week)
12.30 A.M-1.30 A.M ——LR/DI

Weekends :

8.30-9.00 AM—Read editorials or newspaper
09.00-11.30—Quant
11.30-12.00—Break
12.00-01.00—Reading comprehension of 1-2 passages
01.00-01.30—Lunch time
01.30-04.00—Quant Practice
04.00-05.30— Reading comprehension (1-2) passage
05.30-06.00—Break
06.00-08.00— Solve LR/DI sets
08.00-10.00— Verbal Area (SC,CR,PJ,PC)
10.00-10.30—Dinner Time
10.30-01.30—Full Mock/Analysis

Disclaimer:

This is the rough plan; one can definitely change or shift timings according to one’s weakness and strengths. I would like to say that do not consider it as foolproof, it only helps you to drive your plan. The aim here is not to complete the portion but to have thorough conceptual knowledge. Considering the number of hours I mentioned can definitely change as per your wish but ensure that you cover the syllabus in defined period only. Please compete with yourself and not with others. Every time you take mock ensure you improve and do not take  mocks unless thorough analysis of the previous mock is complete. Give time and definitely, you will see some progress. Keep developing shortcuts which can help you in the exam to save time. Join iQuanta Courses for tricks/ shortcuts and Conceptual understanding. It starts from basics and reaches to a bit above CAT level .
Try experimenting with your mock paper say for ex. Try using elimination method while answering or using shortcuts to see how much time is saved.

Work hard as much as you can. Work Hard Now to Enjoy Later !!

All the best.

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