Final answer:
Always ensure baby's safety during diapering by having supplies within reach or taking the baby with you to get them. Never leave a baby alone on an elevated surface.
Step-by-step explanation:
When gathering supplies for diapering, it is essential to ensure the baby's safety first. You should never leave a baby unattended on a changing table or any elevated surface. If you need to gather supplies, have them within reach beforehand, or if necessary, take the baby with you to get the items. In the context of Elena and Daris expecting their first child, as mentioned in the case study, ensuring all necessary supplies are ready beforehand will be a crucial routine to adapt for their baby's safety during diaper changes.