I am also planning to take GMAT (may be GRE) sometime this year. I don't know why I am so much scared of it. In the last time (almost 5 years before), I was able to get only 550. In fact, I was in Nepal that time and tried to prepare on my own with the help of Baron's book. Later I realized that I had to do lil more homework and should not sit for the test in haste.