This document discusses 5 best kept secrets of QuickBase. The secrets are: 1) Self-maintaining relationships between tables using summary fields, 2) Customizing summary fields for each user using "My Settings", 3) Merging QuickBase data into business documents like invoices, 4) Creating non-tabular reports on forms using report links, and 5) Transforming spreadsheet data into normalized QuickBase tables through extraction and relationships. The document provides examples and step-by-step instructions for implementing each secret.