Businesses planning to transition from Classic to Lightning should consider the following: 1. User Training: Provide comprehensive training to users to ensure a smooth transition and maximize the new UI's benefits. 2. Data Migration: Plan for migrating data seamlessly to the new interface, ensuring data integrity and accuracy. 3. Integration Testing: Test third-party integrations and custom apps to ensure they work seamlessly with the Lightning Experience. 4. Change Management: Communicate the benefits of the transition to users and involve them in the process to build support and ease adoption. 5. Partner Support: If needed, engage Salesforce consultants or partners specializing in lightning migrations to effectively guide you through the process.