Oil at $40/bbl would be a good goal;and gas at $1.25/gal (Today's $$$). The strength of the USD vs Euro is important. No real reason our currency shouldn't be valued as good as the Euro. It was shortly after the Euro start.
Need to get more of the speculation out of the system (but not all, of course).

Or..... what about Price of Bushel of Wheat = Gallon of Gas. (I think there was a "Robin Williams" e-mail that circulated this summer to that effect)

Let's give the Candidates something to strive for.