Hey! I took the GRE last year and I took it twice. I also used Magoosh and supplemented it with Manhattan prep and Kaplan practice tests.
I've always been a 'math' person, but on both tests, I actually did much better on my verbal sections (156q 163v and 166q 167v). I improved during my second GRE exam which I took 2 months after. Between the first exam and second exam, I didn't do much to try to improve my verbal scores- I worked mostly on improving my quantitative section. I quite enjoy the magoosh verbal quizzes, and I did questions whenever I had time- in between commercial breaks, on the bus etc. Any words I didn't know, I wrote on flash cards.
One thing I would suggest is to try to NOT memorize more than what you are capable per day. For myself, I can memorize only 10-15 new words per day and I will always go over all the previous words I learned first before attempting to memorize more. Going into the GRE, I learned ~800 new words. I also read more than usual - especially the economist and the new yorker. Again, any word I did not know, I wrote down and looked it up. Using mnemonics also helped!
Have you used manhattan practice exams? I think using other practice tests also helped since different companies have different styles of test writing. I'm not sure if it was the Manhattan practice exams or Magoosh, but I think they also have a 'test breakdown' portion where they tell you which part you are most capable in and where you need a little more work. Do you know which part you struggle more in? For me, I usually did well in the sentence completion but RC was my weak point. This was surprising to me as I actually enjoy that section. If you are like me and RC is the issue, then the memorization of vocab may not mean as much.
Also, don't forget to work on the essay section! I left that until 3 days before the exam and since its the first part of your exam, doing well (or not) can really affect your confidence!
Good luck!!!