Custom GRE Tests
One way to increase your GRE score is to test yourself above the level at which you will be tested.
The way to do this is to create your own custom GRE tests. First you want to collect as many past GRE tests as you can, and then test yourself with each one to determine which types of questions give you the most trouble. Keep a log of those questions and create your own GRE test that contains only the most difficult questions, with an emphasis on the questions that gave you the most trouble.
One must take special precautions not think about the answers to the questions or the questions themselves before taking the test. To ensure validity, one must time oneself according to ETS regulations.
John G.