Understand the skills that the exam questions cover by studying information on the CompTIA website. Read extensively from study guides available at your local library. Find free study guides on Internet websites. Ensure you use the guides that address key areas of the latest edition of the CompTIA A+ Certification Exam. Make a practice of writing down things in brief and use these notes for review on the day of the exam. Besides general computer knowledge, make sure you keep yourself abreast of the latest technology.
A good way to study practical aspects of computer technology and troubleshooting is to get actual experience working on a machine. Many old computers are available at garage sales and local thrift stores. Find a cheap one costing around $20 or so; use this machine to gain hands-on experience with the skills the CompTIA A+ certification exam tests. Apply the theoretical information you study to work on this computer and evaluate your preparedness. Go back to studying those concepts that you find confusing.
Solve the sample questions your study guide provides. Take up practice tests on online websites and check your performance. The official CompTIA website is a good source for practice questions. Whether you answer a question right or wrong, study the explanations the practice tests offer. Use this as a guideline to understand the answer expected of you. Use these practice tests to assess your knowledge of the uncommon acronyms from different aspects of computer technology covering hardware and networking processes.
Considering the fact that the exam is timed, it is vital you take every possible step to avoid wasting time. Before beginning the exam, ask for some scratch paper and note down points for easy reference. This will help you save precious time later. Speak to the supervisor when he sets your machine and clarify any doubts you have regarding exam rules or about using the testing software or system. Use common sense to eliminate answers that are obviously wrong --- this makes it easier to select the right one. Watch out for double negatives and think things through before choosing your answer.