620 gmat, How can I improve?

[wangkatja]

With the Manhatten Gmat Cats I scored 610, 640, 680, 680. Now I got 620(Q41,V34) on the real exam.
I was worse in quant and verbal at the real one than in the practice tests. The quant part was particularly easy ( no combinatorics questions etc) so I was actually pretty confident about my answers to the questions.
I am not sure how I can improve, I will go for another Gmat exam next month.
Please give me some advice on how I can prepare for the second test...

[StaceyKoprince]

First, don't schedule your next exam until you figure out what went wrong this time around. :) You don't know what it will take or how long it will take until you figure out what you need to do in the first place.

Our first task is to figure out why you score dropped on test day. Read this:
http://www.manhattangmat.com/blog/index ... ent-wrong/

Does it give you any ideas about why your score may have dropped on the real test? Common causes including timing problems, artificially inflated practice scores (for a variety of reasons), and stress / anxiety.

Also, you mention that the test felt "easy." That's actually a warning sign that something's wrong - you're likely making mistakes that you don't even realize you're making. How is that possible? They're fantastic at writing questions that are harder than they look.

Here's an example:
https://www.manhattangmat.com/blog/inde ... -it-looks/

Next, we also need to get a handle on your strengths and weaknesses. Use the below to analyze your most recent MGMAT CAT(s):
http://www.manhattangmat.com/blog/index ... ice-tests/

Then come back here and tell us the results of your analysis and what you think you should do based on that analysis. (Note: do share an analysis with us, not just the raw data. Part of getting better is developing your ability to analyze your results - figure out what they mean and what you think you should do about them!)