Thanks for the comment! Kudos to you as well for the helpful suggestion. For some reason, I was a little hesitant to add the nutrition links. But you're right; they probably belong in this thread.
What did you think about the ETS document? Some of the suggestions are obvious and it doesn't directly deal with the GMAT. However, this company used to administer the GMAT, so any of its insights will hopefully be of some benefit. Besides, test anxiety isn't specific to any one test, whether it occurs during the GMAT, the GRE, or any other exam.
Thanks again!