How to prepare and practice for NCLEX exam?

NCLEX Preparation Tips:

You can practice the practice tests on the official website, click here to prepare for the examination.
The mock test series is available here with the questions that can appear in the examination. The NCLEX mock Test series can be practiced for the best preparations.

Some preparations for the Exam Day:

Dress Comfortably: You're required to leave hats, scarves, gloves, and coats outside of the testing room. 
Arrive Early: Plan to arrive 30 minutes before your exam. If you are more than 30 minutes late, you may have to register and pay another exam fee.
Receive Materials
You may not bring in paper or writing instruments for this computer-administered exam. An on-screen calculator and erasable note board/marker for making notes will be provided.
Set Your Pace: You'll have up to 4 hours to complete the RN and PN exams, including the short tutorial and 2 optional breaks (the first 2 hours into testing, the second after 3.5 hours of testing). Take time to analyze each question carefully—once you submit an answer you can't return to that question.