As soon as you receive the test, scan or preview it. Look through the entire test to see the format, such as how many questions are there, are they all multiple choice and so on. This will give you a good idea of how to pace yourself so that you do not run out of time. If you are taking a test that does not allow you to look through the whole of it, you should have been given information about how many questions it has and how it is structured beforehand; use this information to spend your time wisely.
Read each question carefully. Circle or underline keywords in the question to keep yourself focused on what the question is asking. Using those keywords, analyze the answers to determine which fits best. Not all questions will have a perfect answer, so you must use your critical thinking to determine which answer fits the best.
After reading and clarifying the question, read through the answers. Immediately scratch out or cross out the answers that you know are wrong. Most questions will have at least one answer that is obviously wrong, so remove its visual clutter. You can then focus on the remaining answers. As you work through and determine which are definitely wrong, cross those out as well until you ideally end up with one. If you get stuck and are left with two answers, choose the one that fits the best and use your instinct about which is right. By eliminating answers, you have now increased your chances of getting the question right. Never leave a question blank or unanswered.
Use what is called a memory dump wherein you write down everything you think you'll forget on a scrap piece of paper at the beginning of the test. You can then refer back to this as necessary and you will be less stressed because you will not be worried about forgetting the information. If you are not allowed scrap paper, you may use the margins of the test to write down quick outlines of information to keep yourself organized.