Familiarize yourself with the key skill areas the test measures, which are "Arithmetic Reasoning," "Mathematics Knowledge," "Word Knowledge" and "Paragraph Comprehension." Note that the Arithmetic Reasoning and Paragraph Comprehension sections, which test your ability to make sense of complicated math problems and paragraphs, rely on core concepts from the Mathematics Knowledge and Word Knowledge sections, which test key arithmetic and vocabulary skills. ASVAB includes a detailed run-down of all sections on its website.
Work alone or in a group to develop questions appropriate for flash cards in a specific skill area. For example, you might use words you study for the Word Knowledge portion of the test in paragraphs and then list four potential sentence interpretations on a card and place it in the Paragraph Comprehension skills group.
Study each skill area at a set time and with a specific set of flash cards. ASVAB's website includes a sample schedule, which provides easy-to-follow guidelines if you don't feel like creating your own schedule.