Retaking the GRE can be a frustrating prospect, but we have some resources to help guide you.
First, here's a flowchart guide about what you should do from here:
Next, check out these blog posts that discuss studying for a retake:
You should definitely follow a study plan this time around. There are 1-, 3-, and 6-month study schedules that will take you through Magoosh lessons and practice as well as other recommended resources.
If you're unsure about how long should you study, this post can help:
I'd suggest you give yourself as much time as possible: at least 2-3 months, ideally. And though you may have been through most or all our practice questions once before, don't worry — our students who improve the most tend to go through the practice questions at least twice!
Finally, before you begin your studies, you should review your last exam to see what areas you need to improve on the most. ETS has a great resource that breaks down your last test by question type, pacing time, and question difficulty: