Get official. Look at the CSET Test Guide.
It's got sample questions from throughout the exam. When we develop our course, we are not allowed, for copyright reasons, to use their questions, so we created our own.
However, there's nothing like going to the horse's mouth to get their view of what the test is like. Because this is a study group, feel free to post questions and advice about them.
In case you were waiting, here's the link: http://www.cset.nesinc.com/PDFs/CS_110items.pdf.