2nd term limits?

Given that the presidency is a marathon, that the second term is known for lethargic policy and the obligatory scandal and that the second term is really just a reward for a good first term, should we consider limiting our presidents to one term? I am not calling for a law here. And I do recognize that getting your guy into the presidency is hard enough that keeping him in for a second (when certainly that is easier) seems like a good idea. But isn't there some way we could change the tradition? (e.g. insert the VP as a candidate for the second term, thereby carrying the momentum but bringing fresh ideas and people.)

That is enough run on sentences for one morning. Discuss among yourselves.