What are /r/GREhelp's favorite Products & Services?

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https://castbox.fm/va/8520

(GRE vocabulary podcast by Victor Prep). This has teally helped me in getting familiar with vocab while commuting & walking. I usually make my own mnemonics to remember the tough words.

> any advice to improve quickly

Figure out your weak areas and focus on those. The other key to scoring 165+ in quant is mastering the basics/avoiding silly mistakes. So when practicing note all your mistakes and review them daily.

If you haven't yet, I'd recommend getting the ETS Quant Book for the most test-like practice.

>I work full time at an engineering firm so I really can only study on the weekend and 1 or 2 weeknights depending on how busy work is. Thanks

I would also try and study every day, even if it only means 20-30 minutes during lunch or after work on busy days. Make the time. The continuity helps keeps thing fresh.

Also, when you mention verbal & quant guides, do you mean these 2 books below?:

http://www.amazon.com/Official-Quantitative-Reasoning-Practice-Questions/dp/007183432X/ref=sr_1_3?ie=UTF8&qid=1432937026&sr=8-3&keywords=quant+guides+GRE

http://www.amazon.com/gp/product/007183429X/ref=ox_sc_act_title_3?ie=UTF8&psc=1&smid=ATVPDKIKX0DER

If I only had a week, I'd be hitting up practice tests like crazy, then going back and reviewing any math related to any problems I got wrong. Go here to grab the ETS powerprep software, then hit all the math sections you can. This will let you get comfortable with the test at the same time as getting more comfortable with the math. In addition to the algebra and geometry stuff, you'll need some basic statistics and a good knowledge of how to extract information from charts and graphs.

If you've got time to grab it, I'd also recommend pairing your studies with math review for standardized tests, which has the best style of any test review book I've ever seen. Pick any concept, it's got a great quick review of the concept, an example of it being used, and a few follow up questions for you to answer. It's really helpful in those "wait, when do I use combinations instead of permutations?" type situations.