As per your request, I am giving you some tips to prepare for the common admission test (CAT), hope these tips will help you in your preparation.

Prepare for the exam according to your syllabus
Try to solve previous year’s papers, causes history repeats itself
Refer some good books that have good contains and have good solutions for the questions.
Try to solve questions as fast as you can, speed matter in exam
Take some mock test

Here, I am recommending you some good books to prepare for the CAT exam.

How to Prepare for Quantitative Aptitude for the CAT Common Admission Test , Author:Arun Sharma

TMH's How To Prepare For The Data Interpretation And Logical Reasoning For The CAT 3rd Edition by Arun Sharma

How to Prepare for Verbal Ability and Reading Comprehension for the CAT Common Admission by Arun Sharma Publisher

English Proficiency IMS India
Word Power Made Easy by NORMAN LEWIS
Wren and Martin English Grammar
Word Power Made Easy by NORMAN LEWIS
Student's Companion By Wilfred D. BestVERBAL ABILITY BY ARUN SHARMA
30 Days to a More Powerful Vocabulary by Wilfred Funk and Norman Lewis.
A Communicative Grammar of English By: Geoffrey Leech
Business English and Communication By: Clark
English PLUS I.C.S.E. For Class 10 by Xavier Pinto

Business Magazines

Business Line by The Hindu Group
Business Today by India Today Group
BusinessWorld
Management Compass Career Launcher
Business & Management Chronicle by Chronicle Publications
Competition Success Review

Newspapers for CAT

The Hindu
Economics Time
The Statesman