The first time I took it at AU 2011, I didn't refresh the files so that I was working with new files and I failed it. The good thing about AU is that you can just go back and take it again.
Lesson learned - Refresh files
As was said, there are a lot of distance and area inquires. There is usually a modification of some type like move, stretch, rotate... prior to the inquiry. One trick that helps when you are asked for a distance to and from something, draw a line and then use that to get the length instead of simply using the distance command and snapping to the points. At the same time - use the hatch command when you are asked to use the AREA command.
It is still worth while knowing how to use these commands but sometimes it is just quicker to draw a line or place a hatch and then use the LIST command on them to get your answers.
~Greg