Build your vocabulary by exposing yourself to a wide range of reading material. Unlike the case with the quantitative section that contains definitive answers, cramming for this particular section won't suffice, according to Bloomberg Businessweek. Read new books on varying topics that have a range of genres and difficulty levels. Engage with the text by looking for themes, argument structures, and logical progression. As you read, annotate in the margins any questions or comments you may have.
Revisit your basic grammar skills. For the sentence correction part of the verbal section you need to be familiar with the eight parts of speech as well as some basic grammar rules. You should know the difference between comma splices, run-ons, and fragments. Equally important is knowing the four basic sentence types: simple, compound, complex, and compound-complex. It is not necessary to know every nuance of English grammar, but you need to grasp the basic concepts. Visit your college's writing center for help.
Study the format of the exam to familiarize yourself with the test structure. Download a practice GMAT test from mba.com, the official GMAT website, which also offers access to free test-preparation software. With this software, you can practice taking the verbal part of the test. Remember that there is a written portion within the verbal part of the exam. Simulate live testing conditions by timing yourself. If you run out of time, learn ways to improve your time management and pacing.
Review the essay topics and practice your writing skills by consulting the analytical writing assessment topics available on mba.com. The analytical writing part of the verbal section is meant to assess your reasoning and logic. Again, practice and repetition are key. When you are finished with your writing, have someone else assess it, preferably someone at your college's writing center.