In order to crack your paper you should be aware of the syllabus and exam pattern. Your basics should be clear. So, that you can solve all types of questions. You should be aware of strength and weakness. So, you can work upon them. You should make your important notes it will help you at the time of your revision. You should solve complete mock test series for your practice.

All the best for your preparation!!

I would suggest you to follow below provided preparation tips -

Before starting your preparation, know the exam pattern & syllabus of VITEEE 2018.

Prepare a time table according to the subject & syllabus.

Solve unsolved sample paper, mock tests & previous year question paper.

Know your strong & weak points of the study.

Practice, Practice & Practice.

Stay fit & healthy, Eat Fresh fruits & vegetables. Avoid Junk foods.

Also, to know the detailed preparation tips you can go through the below link -

How to prepare for VIT 2018?
Hope this helps!!!