CAT

Hello Shruti,
For VA, which was my the weakest section I alternated in RC and VA, practised 4 RCs one day, solved 40-50 VA questions the next day and so on. For RCs, in particular remember you don't need to solve all question of an RC, because even if questions seem easy options might be tricky so leave them. Solve easy questions in that time. (Do not take any QA question, RC or a DI LR set on your ego. One cannot afford it in an exam like CAT where saving time is everything, learn to leave the questions too).
For vocabulary, I completed word power made easy by Norman Lewis and revised vocabulary sessions of TIME 34 times. (Never SAT and mugged up the words, that's not required. CAT judges you on your analytical skills mainly and not vocabulary). You can take tips from my strategy.
Hope this helps.

For converting any of the top 10 colleges, the safest percentile is 99+. You may convert it at less, but the safest is 99+. Now coming to my experience, I started preparing for CAT in 3rd year of my engineering, but I was never serious so I ended up missing a lot of classes and was very irregular. Ended up scoring less. Decided to give CAT another attempt and this time promised myself to be serious about it. After my engineering, I didn't take up a corporate job (had an offer). Instead I started working with my father in our family business and was preparing for CAT alongside. I will share my daily routine with you:
I used to go to work at 10am and return by 5pm or 6pm. After that from around 7 or 8, I used to start studying till 1 or 2 am. I used to give one section test of RC consisting of 3 RC passages daily. This was mainly because I was the weakest in VA-RC. I used to analyses the RCs and then start with QA and DI/LR on alternate days. I am a moody person so used to study chapters based on my mood. On days when I was too tired, I used to solve easy chapters. For vocabulary, in the initial first month, I started doing 1 or 2 sessions of word power made easy by Norman Lewis and completed it. I used to give mocks mainly on weekends. Most of my weekends were spent mainly on giving a mock followed by analyzing a mock. Lastly, I would say consistency is a must.
This all worked for me. Hope you benefit from some of it too.