The Military ASVAB test is really an intelligence test. My best advice to you is to start reading. Do not let a free minute pass between now and when you take the test without your eyes on some book, magazine, or newspaper. And keep a dictionary close at hand -- look up every word about which you have the slightest doubt. The larger your vocabulary, the smarter you appear. Oh, and turn off the TV, radio, music player of any type, video game, etc. to maximize the amount of free time you have for reading.