Final answer:
Label the specimen after it has been collected using the patient's name, and avoid reusing labels from previous specimens.
Step-by-step explanation:
The appropriate action when labeling specimens is to label the specimen after it has been collected. This ensures that the label accurately corresponds to the specimen. It is important to use the patient's name on the label rather than their room number, as this helps to maintain accurate and specific identification. Reusing labels from previous specimens should be avoided to prevent confusion and potential errors.