National Review editor Rich Lowry's advice:
In a presidential debate, a candidate’s bearing matters. Al Gore may have beaten George W. Bush on points in their first debate in 2000, but he audibly sighed. That small indicator of an arrogant impatience sank him. If Gingrich shows the slightest bombast or ill temper, if he hectors or gives off a sense of intellectual superiority — in short, if he conducts himself in a typical Gingrichian manner — he will lose the debates in a rout even if he bests President Obama on the merits.