I understand how disappointing that must have been, especially after putting in so much effort. It's great that you're not giving up and are determined to improve your score. Here's what I suggest:
Practice Tests: Since you've already used
Magoosh extensively, I recommend trying out the
Manhattan Prep practice tests. They are known for their realistic test questions and can provide a fresh perspective.
ETS Powerprep Tests: You mentioned using the ETS Powerprep tests, which is a great choice. They are the closest to the actual GRE, so practicing with them will be beneficial.
GRE Mentor Course: It's excellent that you've invested in the GRE Mentor course. The official ETS resources are invaluable for GRE preparation.
Strategies for Improvement: Focus on the areas where you struggled during the last test. For Quantitative Reasoning, ensure that you're comfortable with all the concepts and have practiced a variety of problems. For Verbal Reasoning, work on building your vocabulary and understanding different question types.
Review Diagnostic Score Report: Once you receive your diagnostic score report, pay close attention to the areas where you need improvement. This will help you tailor your study plan effectively.
Mock Tests: Take full-length mock tests to build your stamina and simulate the test environment. This will help you manage your time effectively during the actual test.
Last Week Preparation: It's a good plan to save the last 2 Powerprep tests for the final week. This will allow you to assess your readiness and focus on any remaining weak areas.