1. Data Governance: Implement policies on data governance so as to ensure data quality, security, and regulatory compliance.
2. Automate Where Possible: Automate extraction, transformation, and loading of data to save more time and reduce human errors.
3. Consistency in data: Check and audit the data from time to time so that it appears uniform everywhere in the sources.
4. Scalability: Ensure that the framework you design for your integration can accommodate more source addition other than increased volume of data as needed.