I live in NJ, sometime last week I got a paper which shows exact layout of buttons there will be at election with all the names. So in theory I can practice at home pressing on buttons (I think the paper folds out to same size as the actual booth machine).

So it's pretty convenient. Of course I still have to go online to look each individual's positions, but there's no way to present an unbiased view of each candidate, at very least you will present them in some order, and even that matters.