Mostly you’ll be finding many mock tests for CLAT 2019 on Internet and other sources. But the OPUS Career in Law is the best one to prepare and where it can help you a lot to score well. please go through following website given below,

Https://www.theopusway.com/mock-test-series/

All the best!

Here are some of the preparation tips you can follow for the preparation:

Make Schedule
Divide your topics or your subjects to cover in time duration according to the time left for your examination so that you can cover all your studies.
Clat Sample Papers:
By doing the practice with sample papers you may get the questions which have the probability of occurrence, you can evaluate yourself at the initial stage of preparation and you can practice to attempt the maximum questions within the given time limit.
Notes Preparation
Make short notes as per the subject wise so that you can review them later at near the examination time. Notes writing is the easiest way to learn whatever you read.
Reading Current Affairs
Reading in any way is the best habit for preparing the examination. Knowledge of current affairs will help you to make better your preparation. Read the newspaper magazines and social articles from the day first and attempt to update yourself with current general knowledge in political, social and cultural scenario.

You can join sectional or full length Mock test, You can prefer Career Launcher, Disha test series for it.

Good Luck!