In case you don't already have the study guide, here's the site where you can buy it.
It is found here. >>> http://www.eriproduct.com/detail.aspx?ID=1
In addition to this study guide a practice test is offered on the website that I also think will be of help.
It can be found here. >>> http://www.eriproduct.com/detail.aspx?ID=88
These are two sites that have tests that you can use as practice.
Now this is a link I found around the site and it takes you to some other school's web page so just ignore the part where it talks about going to the Learning Lab.
What really helped me was to practice my timing since in the past timed tests weren't my strong point. However, I found that with practice by timing and pacing myself I was able to comfortably take the test without all the stress of worrying about the time.
Some people may find this test hard and some find it very easy; it depends. If you are not prepared, it may be hard and it really is easy if you know what you are doing and know what to expect.
Put simply, if you prepare yourself well, you will do wonderfully!