In that case I rely on my local Republican party contacts, and not just one.  They usually put out a Voter Guide fairly early.  You can look at the recommendations, sanity check them, and follow up if you have questions.  It's important to know who you going to pull the lever for before you go inside.  In most things, like fighting, sailing, surviving, early preparation is key. I think it's important to have a network of like minded voters, and that's who connecting with the local party officials is important.