What is the proper procedure to stay imposition of sentence on one crime but not the other?

Penal Code section 654, subdivision (a) provides, in pertinent part, that "[a]n act or omission that is punishable in different ways by different provisions of law shall be punished under the provision that provides for the longest potential term of imprisonment, but in no case shall the act or omission be punished under more than one provision." When Penal Code section 654 applies, the proper procedure is to stay imposition of sentence on one of the crimes, with the stay to become permanent on completion of the term imposed on the other. (People v. Pearson (1986) 42 Cal.3d 351, 360