Be sure you understand what the test is intended to do and what its limitations may be. Remember, the tests are not 100 percent accurate. If the test results rely on color comparison and you're color blind, be sure someone who can discern color helps you interpret the results. Note special precautions, such as avoiding physical activity or certain foods and drugs before testing. Follow instructions exactly, including the specimen collection process, if that is a part of the test.
Sequence is important.
Don't skip a step. When a step is timed, be precise. Use a stopwatch, or at least a watch with a second hand. Note what you should do if the results are positive, negative, or unclear. If something isn't clear, don't guess.