To prepare for IPU CET  2019 you need to be well versed with the syllabus and the pattern. I'll be detailing some points you need to keep in mind for preparation of exam.

The Syllabus: The syllabus of CET covers following:

Syllabus for English

English Vocabulary,Synonyms,Antonyms,Analogies,English proficiency,Idioms and Phrases,One word substitution,Rearrangement of word in sentences,Rearrangement of sentence in paragraph,Fill in the blanks,Close test,English Usage errors,Common error,Spotting errors,Inappropriate usage of words,Spelling Mistakes,English comprehensions

Syllabus for General Awareness

Business and Trade awareness of world and India,General Awareness,General Geography,General Economic Study,General polity,General Science,General Computer Science,Sports and awards,Current Events

Syllabus for Logical Reasoning

Direction and distance Test,Analogy Test,Classification (Odd Man Out) Test,Coding & Decoding Test,Number Test,Series Test,Relationship Test,Alpha Numeric Symbol Sequence,AlphabetTest,raking Test,time Sequence Test,MathematicalOperations,logical Word Sequence Test,insertMissing Sequence Test,Cubes and Cubical Dice Test,Data Arrangement Test,Data Sufficiency Test, Logic Test,Statements Assumptions,Statement Arguments,Statement Conclusion, Statement Action, logical Diagram (Venn Diagram)

You can consult following books for preparation of B.Com Hons. 

High School English Grammar & Composition Revised Edition (English) 1st edition of wren and martin

Objective General English by S.P. Bakshi

Manorama Yearbook 2018

Quantitative Aptitude N.K.Singh

Quantitative Aptitude R.S.Aggrawal

Other things to keep in mind.

1. Keep practicing and polishing your skills. Remember it's hard to score every point and each point has its value. 

2. Work on your strong points. And the easy ones of your weak zones. 

3. Use model papers and previous years papers if accessible.

4. An important deredetermi in exam qouwo be your time management. Keep practicing the exam many times before the actual exam. 

5. Make a practical schedule and follow it for at least one week. Then make necessary changes and follow it the next week. Keep making changes when necessary. Find what works best for you. 

6. Keep in good state of health and take proper sleep. Avoid losing marks in negative marking.