What is the effect of section 654 of the California Criminal Code on a defendant who suffers two separate criminal convictions?

Section 654 "precludes multiple punishment for a single act or omission, or an indivisible course of conduct" (People v. Deloza (1998) 18 Cal.4th 585, 591) and ensures the defendant's punishment will be commensurate with his or her criminal culpability (People v. Kramer (2002) 29 Cal.4th 720, 723). If a defendant suffers two convictions and punishment for one is barred by section 654, "that section requires the sentence for one conviction to be imposed, and the other imposed and then stayed." (Deloza, at p. 592, italics added.)