serpentina, I bought the GRE official guide, the Manhattan tests, Magoosh, and EmpowerGRE. I've picked up 9 points so far after 3 practice tests. I actually really like EmpowerGRE because its math rules and approach based. It was the approach training that was missing for me before, so adding that element has really helped. The official guide is really good to keep going back to.
Great summary. Thank you for posting. There's one thing I didn't see mentioned that I'm curious to hear how you approached...the Analytical Writing essays. What did you use to prep for the essays, and how did the essays go for you? Thank you for your time.