Three Flow best practices recommended by Salesforce include: A) Never hard-code Salesforce IDs, as hard-coding can lead to maintenance issues and break the flow when used in different environments. B) Provide an error handler to manage exceptions and ensure users are presented with understandable error messages, improving the flow's robustness and user experience. E) Control when users can navigate backwards to manage the flow's navigation and ensure data integrity and user experience are maintained. These practices enhance the flow's maintainability, user experience, and reliability.Reference: Salesforce Help Documentation on Flow Best Practices.