The analytical writing assessment is very challenging. You must practice this writing many times and you will see much improvement. The post above this is very true. I also used the http://greenlighttestprep.com/module/gre-analytical-writing resource which is free (I paid for the full price to get all of the excellent video lessons in math and verbal sections).
Sincerely,
JP
I am also making positive use of the Greenlight website resource for my study improvement. It is embarrased to say that I did understand the analytical writing assessment video lessons to be free (!!!) but they are free http://greenlighttestprep.com/module/gre-analytical-writing I purchased the math and verbal package, and I am happy.
Sincerely,
JP