Romney needs an acting coach. He needs to learn how to walk, for example. He takes stffled, awkward steps. Maybe not a big deal to people with deep focus on the issues, but that's not who Romney needs to win. Little thinks like that go towards his "awkward" factor which hurts his favorability with so-called swing voters.
Another thing Romney could do is dumb-down his message a little. Focus more on basic statements like "I will fix the economy. I know how. It's what I do."