Get in a little practice first via the LearningExpress Library.
This electronic resource is available throughout Michigan (thanks to the Michigan eLibrary), called LearningExpress Library, contains a surprising number of practice tests. You supply your own username and password to get in, and once you are inside, you have your choice of 13 so-called “learning centers” including College Prep (practice taking, among others, the ACT, CLEP, SAT, and TOEFL), College Students (GMAT, GRE, LSAT, MAT, MCAT, and PCAT), GED Preparation, Occupation Practice Skills (such as a CDL, Culinary Arts, EMS, Law Enforcement, Nursing & Health, and Teaching). Also included are Skill Building resource for Adults (including math, public speaking, statistics, trigonometry) and job search/resume resources.
This is a surprisingly varied and rich resource.