I think Zero Percent income tax rate might get a lot of voters interested, also, as has also been suggested before, when he is asked awkward or deliberately leading questions, he could try words to the effect, Well, I would do X and if people want to know a little bit more of my policy on X, they can go to youtube and watch a few of my speeches on X.
And I also think a GREAT line for him would be, 'we shouldn't be building bases in Iraq or Afghanistan, we should being going back to the moon and building them there'.
http://www.youtube.com/watch?v=YiRv6okvACE