I will take the ASVAB soon. Any good tips/advice for taking the test (any good ways to study, most important areas, etc.)?

Most important math.

Get good rest the night before the test. Easy on the coffee the morning before the test. Eat a low carb breakfast. Relax your body and mind before the test starts. Read and follow ALL of the instructions. RTFQ (read the fine question, completely). RTFA (read the fine answers, all of them, completely, before selecting one). There are no trick questions. If the test appears to ask a straight forward question with a fairly obvious answer, then that's what it is. Follow RTFQ and RTFA and don't read too much into a question.

The word math is 80% of the test, study.