While I voted straight R, I confess that I didn't feel that I was sufficiently well informed enough to cast an intelligent vote in every single obscure nonpartisan judicial race. Since I consider myself pretty well educated and informed, it does make one wonder a bit about how we go about selecting people for those offices.
I found that by checking the local county GOP website, i.e., Google search for "County Name" sample ballot, I got a list of those individuals in non-partisan races who are actually Republicans. Although that does not guarantee a good selection of candidates, it's better than nothing.