Preparing for the arrival of a second baby involves organizing and getting ready for the newborn. It is important to ensure that all essentials such as clothing, feeding supplies, and diapers are purchased and ready. Setting up a nursery and making arrangements for the older child are crucial. Preparing meals in advance and organizing support from family and friends are also important steps to consider. Overall, thorough planning and preparation are necessary to make the transition smooth and welcoming for the new addition to the family.