Hello Boryana,
I'm glad to hear you did well, especially how you studied for it. I took the exam once, and did quite poor on the verbal (500). At first my excuse was that I am an engineering student... well, thats not acceptable. But my analytical nature did lead me to create a tool to help me out. Its a program which trains people on words through a quiz like format. It shows synonyms, antonyms, and the words in context from actual published text. Originally the tool was for my personal use, but a few of my peers showed interest so i have made it into an online app.
The website is pretty cool i think, and uses many of the methods you have used. I hope it can help others do as well, check it out GRE Vocabulary Training
Charles