GRE: Any last minute advice?

Shame is very counterproductive. It makes you tense up and not have mental access to all you do know. Last minute advice? Relax, you have prepared enough, you will do well. This is not a competition with "everyone around you". The important thing is that your score be good enough, which it will be, not that it surpass anyone else's. Besides, it is typical for people to lie about scores. Theirs may be lower than yours. Let it be. Get plenty of sleep, have a good but light breakfast on test day, and relax!