With only a few days at hand, I know you must be looking for some magic potion that could help you clear CAT. There would be numerous crash courses and test series promising to help you crack CAT in some xyz days. But believe me, that's not what is required at this point of time. What you need is a little bit of confidence and a few things you should keep in mind

http://www.clearlawentrance.com/2017/11/clat-syllabus-exam-pattern.html

There are 5 sections in CLAT. You need to cover all the syllabus.
 English include Vocabulary, Reading Comprehension, Grammar
 Reasoning: Logical & Analytical
GK: Static as well as Current Affairs
Maths: Arithmetic, Basic Algebra & Geometry (Mainly Mensuration)
 Legal Aptitude: Indian Polity, Law of Torts, Contracts, criminal.

Here are some of the important tips you can follow:

•     Get to know the exact syllabus of CLAT. Get prepared for each sections.
•     Being updated with General awareness and current updates and even legal updates.
•     Time management is very important.
•     Give mock tests-offline and online both.
•     Work on your vocabulary. Read newspapers and relevant novels. This will also help you in increasing your speed.

You can also check the syllabus of CLAT with given below link.

CLAT Syllabus