Navigating a usage-based model for PostgreSQL requires understanding how pricing works and how well it will scale. Developers must consider various factors, including data storage, scaling, and performance, to ensure cost-efficiency and optimal performance. A usage-based model promotes a culture of continuous improvement, where developers focus on database health and efficiency rather than mere storage management. To effectively manage their PostgreSQL database size in a usage-based model, developers should adopt good data practices, such as reducing bloat, fine-tuning parameters, practicing indexing hygiene, using compression, setting up tiered storage, and implementing data retention policies. By adopting these strategies, developers can reduce their database size, improve performance, and scale their databases efficiently and effectively.